[Q] Some BL Unlock questions - Xperia Z Q&A, Help & Troubleshooting

So, my lovely XZ that is supposedly locked to Three UK says bootloader unlockable=no. However, when I hold up and plug in the usb, the light goes blue and Flashtool reports that a fastboot device is connected. Isn't fastboot unusable on a locked bootloader? Anything simple I can do to check this?
Secondly, if fastboot can be accessed, and I have an auto-generate key from the Sony bootloader unlock site, will this still now work if bootloader unlockable=no? Or am I barking up the incorrect trees here? I have toa dmit I didn't check whether bootloader was unlockable before flashing the stock variation by [NUT] and I know the root method he uses sometimes sets this value to "no" even though it was previously yes. Would flashing the "fix" for this to check break anything if the bootloader isn't unlockable?

Operator locked Phones can't be unlocked, so yes, your barking up the wrong tree.

XperienceD said:
Operator locked Phones can't be unlocked, so yes, your barking up the wrong tree.
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Click to collapse
Thanks, just thought I may have got lucky

nikc0069 said:
Thanks, just thought I may have got lucky
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Click to collapse
I'm tempted to go to a Service Centre with a couple of crisp bank notes and see if I can get mine done, and this is the last time I get a Phone from an operator.
From me to you.

XperienceD said:
I'm tempted to go to a Service Centre with a couple of crisp bank notes and see if I can get mine done, and this is the last time I get a Phone from an operator.
From me to you.
Click to expand...
Click to collapse
If you have any success please let me know the bank note configuration and method for installation into Sony operatives hands.

nikc0069 said:
If you have any success please let me know the bank note configuration and method for installation into Sony operatives hands.
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Click to collapse
I will. I did have faith in the great Devs here coming up with a solution, but that has since faded from what I've been reading, and we've got Sony, along with the operators to blame for that.

Mainly the operators. I actually asked 3 why they locked the bootloader. They spun some crap about security and kept telling me that I could to to Sony to unlock it which shows they know nothing. Seems like it's all in the ta partition but without doing a diff of a hex dump of unlocked and locked from the same device don't really know what can be done.
Sent from my C6603 using xda premium

Related

re-lock bootloader?

is there anyone out there found out if its possible in any way to unroot and relock the bootloader???
*sigh*
ibtl
i know this has probrably been answered alot of times but i figured ask and see how e are on this? any new updates on this??
xghostyxjokerx said:
i know this has probrably been answered alot of times but i figured ask and see how e are on this? any new updates on this??
Click to expand...
Click to collapse
would like to see this happen to.
Not "ok" that it voids the warranty.
xghostyxjokerx said:
i know this has probrably been answered alot of times but i figured ask and see how e are on this? any new updates on this??
Click to expand...
Click to collapse
You figured wrong.
uansari1 said:
You figured wrong.
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Click to collapse
He figured people wouldn't act like trolls?
http://lmgtfy.com/?q=Relock+Nexus+One+Bootloader
kobecamp2009 said:
http://lmgtfy.com/?q=Relock+Nexus+One+Bootloader
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Click to collapse
And .... [drumroll] .... that does not answer the question.
I can. Not many others with the same luck though.
jesus. Nobody gave this poor guy a direct answer?
Very few, and I mean probably like 5% of all nexus one's can relock their bootloader. It's some special Holiday edition or something.
But as of right now, no you can't relock it.
stuff said:
jesus. Nobody gave this poor guy a direct answer?
Very few, and I mean probably like 5% of all nexus one's can relock their bootloader. It's some special Holiday edition or something.
But as of right now, no you can't relock it.
Click to expand...
Click to collapse
thank you!!! at least some help and some dont...i thought this was a q/a section..thanks again!
stuff said:
jesus. Nobody gave this poor guy a direct answer?
Very few, and I mean probably like 5% of all nexus one's can relock their bootloader. It's some special Holiday edition or something.
But as of right now, no you can't relock it.
Click to expand...
Click to collapse
Just out of curiousity, when you say "holiday edition", are you referring to the N1s given to Google employees before the phone was released, or is this just a clever way of acknowledging the good luck of those who got a re-lockable phone?
If the latter, is there any pattern by which one can recognise these phones (serial number, manufacturing date/facility, etc.), or is it just luck of the draw?
kobecamp2009 said:
http://lmgtfy.com/?q=Relock+Nexus+One+Bootloader
Click to expand...
Click to collapse
Ironically, that leads to the search results where I found the link to this page. lol
Penguissimo said:
Just out of curiousity, when you say "holiday edition", are you referring to the N1s given to Google employees before the phone was released, or is this just a clever way of acknowledging the good luck of those who got a re-lockable phone?
If the latter, is there any pattern by which one can recognise these phones (serial number, manufacturing date/facility, etc.), or is it just luck of the draw?
Click to expand...
Click to collapse
I'm not 100% sure but I believe "Holiday edition" refers to the special versions of the phones that have the battery cover with a QR code in it, as said QR code leads to a special holiday game when scanned on the Nexus One. Serial number can't be used to determine which Nexii (Nexuses?) can be relocked and which can't. The easiest way to tell if a Nexus One can be relocked is to power it off, hold the track ball, and power it on again. This boots into the bootloader where you will see on the second line something like "NEXUSONE PVT SHIP S-ON." 'S-ON' means that the bootloader can not be relocked while 'S-OFF' indicates a device can be easily be relocked by running a simple fastboot command from your computer, ''fastboot oem lock." I hope this answers your question.
I know the Nexus One has already been successfully rooted without unlocking the bootloader, but I still hope we can figure out a method for relocking the bootloader. I don't mean to scam warranty, I just hate that awful lock icon on the boot screen.
crawler9 said:
Ironically, that leads to the search results where I found the link to this page. lol
I'm not 100% sure but I believe "Holiday edition" refers to the special versions of the phones that have the battery cover with a QR code in it, as said QR code leads to a special holiday game when scanned on the Nexus One. Serial number can't be used to determine which Nexii (Nexuses?) can be relocked and which can't. The easiest way to tell if a Nexus One can be relocked is to power it off, hold the track ball, and power it on again. This boots into the bootloader where you will see on the second line something like "NEXUSONE PVT SHIP S-ON." 'S-ON' means that the bootloader can not be relocked while 'S-OFF' indicates a device can be easily be relocked by running a simple fastboot command from your computer, ''fastboot oem lock." I hope this answers your question.
I know the Nexus One has already been successfully rooted without unlocking the bootloader, but I still hope we can figure out a method for relocking the bootloader. I don't mean to scam warranty, I just hate that awful lock icon on the boot screen.
Click to expand...
Click to collapse
Shouldn't it be possible to simply flash the SPL from a re-lockable phone onto a phone that (before) couldn't?
nexusdue said:
Shouldn't it be possible to simply flash the SPL from a re-lockable phone onto a phone that (before) couldn't?
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Click to collapse
Unfortunately, no this is not possible. Trying to do so would most likely lead to a bricked handset as the retail devices have a 512k spl and the engineering spl from holiday phones is 768k in size.
Is this working?
http://www.machackpc.com/headline/restore-your-nexus-one-to-its-original-shipping-image/
Will it brick the phone ?
nomedor said:
Is this working?
http://www.machackpc.com/headline/restore-your-nexus-one-to-its-original-shipping-image/
Will it brick the phone ?
Click to expand...
Click to collapse
It will not brick the phone. It will work fine for what it's meant to do. Here's a quote from the page
What will be the end result of your Nexus One:
It will reset your system files to the original System Files
It will reset your kernel/boot image to the original shipping boot image
It will reset your recovery to original recovery
The only thing we will not be able to do at this time is to RE-LOCK your Nexus One.
Click to expand...
Click to collapse
Note that this does not re-lock the device which is what this thread is about. As of right now, there is no way that has been made publicly visible to relock the bootloader of an unlocked S-ON Nexus One. Maybe in the future there will be a way. I hope so, but for now, we're stuck. The method from the link can be used only to restore your phone to the stock ROM, so that you can once again receive OTA updates. It will take away your root priveleges, which I'd assume is the reason you've unlocked your device in the first place. So unless you're tired of being in control of your device, it's pointless.
crawler9 said:
I hope this answers your question.
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Click to collapse
It does, thanks Very informative!
crawler9 said:
Unfortunately, no this is not possible. Trying to do so would most likely lead to a bricked handset as the retail devices have a 512k spl and the engineering spl from holiday phones is 768k in size.
Click to expand...
Click to collapse
I have a shipping S-OFF SPL, but apparently nothing can be done with it.
would be nice to see team unrevoked work on this......

[Q] Xperia Z Bootloader?

Hey guys,
Just wondering if the Sony Xperia Z will come with a locked or unlocked bootloader?
if it is locked, can it easily be relocked after unlocking it for warranty purposes?
I know there isnt much info out right now, but i have never owned a sony xperia phone so,
someone shed some light for me?
Devices from carriers usually can't be unlocked. If you buy it outright then usually it can be unlocked. The process does not record your full IMEI and can be relocked after so you are pretty safe in that regard. My HTC takes the full IMEI (so it can be identified) and if you lock it then it goes to "re-locked" and not "unlocked" .... so the sony method is actually pretty good.
Before buying you can always check on a live unit if bootloader can be unlocked.
M.
mattman83 said:
Devices from carriers usually can't be unlocked. If you buy it outright then usually it can be unlocked. The process does not record your full IMEI and can be relocked after so you are pretty safe in that regard. My HTC takes the full IMEI (so it can be identified) and if you lock it then it goes to "re-locked" and not "unlocked" .... so the sony method is actually pretty good.
Before buying you can always check on a live unit if bootloader can be unlocked.
M.
Click to expand...
Click to collapse
Ah okay thanks mate,
hmm new to Sony here too. So what are the chances of pre-orders from carriers being bootloader locked? Just to clarify, does that mean carrier purchased devices are useless (if they are locked)? I was planning to get my device from Orange Uk as i can get a pretty decent 40% off the monthly tariff which makes it the best deal for me. But if it is locked then I may need to pass on this....bummer
m00moo said:
hmm new to Sony here too. So what are the chances of pre-orders from carriers being bootloader locked? Just to clarify, does that mean carrier purchased devices are useless (if they are locked)? I was planning to get my device from Orange Uk as i can get a pretty decent 40% off the monthly tariff which makes it the best deal for me. But if it is locked then I may need to pass on this....bummer
Click to expand...
Click to collapse
Well, if i recall correctly, the verizon droid DNA had a permanent locked bootloader too, but the guys here on XDA found a way to crack it.
who knows, maybe there will be a loophole discovered after the first few days?
I'm currently using a T-Mobile Xperia T, and the bootloader is not unlockable. So I would guess the same for the Z.
Though I think early units are generally unlocked (but don't quote me on that but this was the case with my Galaxy SIII and another guy mentioned this for UK network 3).
AW: [Q] Xperia Z Bootloader?
mattman83 said:
Devices from carriers usually can't be unlocked. If you buy it outright then usually it can be unlocked.
Click to expand...
Click to collapse
Is this just the way sony handles it's bootloader?
I unlocked several different phones which were ordered from a carrier without problem. Depends on the device itself!
But Sony seems to be very developer-friendly. There's a developer site on sonys website, where details about bootloaders are posted. Don't know the exact url atm, I'm at work...
For me it is essential to get a phone where bootloader can be unlocked. My first phone was a lg, without custom rom I would not use it anymore...
It all depends on the country. In The Netherlands all bootloaders can be unlocked, even if it are branded handsets from a carrier.
again as mentioned this is my first Sony Android device so please bare with me. Can someone explain the reasons to unlock the bootloader as from what i've seen people have said u still can flash ROMS with a locked bootloader?
m00moo said:
hmm new to Sony here too. So what are the chances of pre-orders from carriers being bootloader locked? Just to clarify, does that mean carrier purchased devices are useless (if they are locked)? I was planning to get my device from Orange Uk as i can get a pretty decent 40% off the monthly tariff which makes it the best deal for me. But if it is locked then I may need to pass on this....bummer
Click to expand...
Click to collapse
If you're getting any sort of subsidy discount, it's highly likely your device will not be unlockable.
The general rule for Sonys is: If it is sold SIM-locked, you will not be able to unlock the bootloader. If it is sold SIM-unlocked, you'll be able to unlock the bootloader. If the carrier later gives you a SIM-unlock code for a device that is sold SIM-locked, your bootloader will remain locked (Sony is working on trying to change this with carriers).
spazzy1912 said:
Well, if i recall correctly, the verizon droid DNA had a permanent locked bootloader too, but the guys here on XDA found a way to crack it.
who knows, maybe there will be a loophole discovered after the first few days?
Click to expand...
Click to collapse
Sony's bootloader security is pretty strong. If the Z were likely to have a loophole, the T would've probably been defeated by now.
m00moo said:
again as mentioned this is my first Sony Android device so please bare with me. Can someone explain the reasons to unlock the bootloader as from what i've seen people have said u still can flash ROMS with a locked bootloader?
Click to expand...
Click to collapse
You can cross-flash firmwares for other devices, but you cannot flash anything that has a modified kernel.
Thanks Entropy for your very helpful reply! I appreicate it
In regards to the discount, it is only because a friend works for them and in return are given a discount for friends and family. Otherwise it will be just the same as purchasing it direct from my carrier. My usual experience with purchasing a phone from a carrier, especially a newer phone which has 'just' (first batch usually) released is that they are usually simfree stock (sim unlocked), but heres hoping!
The Bell (Canada) Xperia ZL I have has an unlockable bootloader.
Only stok based roms... cm, miui, paranoid, etc bootloader must be unlocked so you can flash custom kernel
Sent from my LT26i
So therefore AOSP roms cannot run on a Locked bootloader due to requiring a different kernel. Where as variations/modded versions of Sony's rom can be flashed due to not requiring a custom kernel.
I think I understand now. The Sony rom looks decent to be honest which isn't something I can say about Touchwiz. It is actually skinned nicely and I wouldnt mind a de-bloated version of that.
I'm pretty sure sony will unlock it, judging from Sony's recent actions where they released the kernel source for the T if i'm not mistaken. Why wouldn't they do it for this monster phone right?
brambizimski said:
I'm pretty sure sony will unlock it, judging from Sony's recent actions where they released the kernel source for the T if i'm not mistaken. Why wouldn't they do it for this monster phone right?
Click to expand...
Click to collapse
It's already listed on Sony's "Unlock Bootloader" site. So i guess they'll all unlock, unless you get it carrier branded/simlocked and they ( carrier ) will interfere with unlocking process.
m00moo said:
again as mentioned this is my first Sony Android device so please bare with me. Can someone explain the reasons to unlock the bootloader as from what i've seen people have said u still can flash ROMS with a locked bootloader?
Click to expand...
Click to collapse
I believe you need an unlocked bootloader to be able to boot the rom?
For htc devices, you need an unlocked bootloader, but it does not have to be S OFF.
If it was S ON, you just had to do an extra process of manual flashing the boot.img through fastboot
This is pretty simple if it's sim locked then it's also bootloader locked. The issue is not if you bought it on your carrier or on a retailer store. It's about locks
spazzy1912 said:
I believe you need an unlocked bootloader to be able to boot the rom?
For htc devices, you need an unlocked bootloader, but it does not have to be S OFF.
If it was S ON, you just had to do an extra process of manual flashing the boot.img through fastboot
Click to expand...
Click to collapse
Depending on what you mean by "boot the rom" i am assuming you are referring to AOSP roms which use a different kernel to stock roms usually. Thus if you cannot flash a custom rom on the phone with a "locked" bootloader, you are stuck with stock Sony type roms. Don't mind it personally just sucks i cannot experience the great kernels that the XDA devs release. Fingers cross the first batch of pre orders will be unlocked though as they are usually sim unlocked in my experience.
Riyal said:
This is pretty simple if it's sim locked then it's also bootloader locked. The issue is not if you bought it on your carrier or on a retailer store. It's about locks
Click to expand...
Click to collapse
50% true. As Entropy said the simlock can be "unlocked" by the carrier. This will therefore then be a sim unlocked device, but the bootloader remains locked. This needs to be clarified to Sony noobies like myself who may think sim unlocking will result in a unlocked bootloader, or by buying a sim unlocked device from say Ebay they have definately gotten a unlocked BL.
spazzy1912 said:
I believe you need an unlocked bootloader to be able to boot the rom?
For htc devices, you need an unlocked bootloader, but it does not have to be S OFF.
If it was S ON, you just had to do an extra process of manual flashing the boot.img through fastboot
Click to expand...
Click to collapse
It's different again. With a locked bootloader you can't flash a custom kernel *at all*. I'm on a HOX now so I know all about the stupid htc bootloader unlock It basically means the device is useless for custom roms etc..
Still waiting to see if my local carrier will lock it or not, they have a mixed history with simlocking devices so could go either way. If it is locked I'll just pick get an iphone instead (should be roughly same price on contract) to sell on ebay and buy my sony outright I'll make it work one way or another.
M.

Bootloader Unlock Code - and locked bootloaders

Dear all,
Just as you might already know, not all Xperia Z are blessed with having an unlocked bootloader .... it apparently is something related to the carrier though and not to Sony themselves. As it happens if your bootloader is locked and is NOT unlockable you can still head to the website and get your unlock code by putting in your IMEI.
Now that's weird ...... Now just wondering if the same procedure could be applied to get the device bootloader unlocked ....
Regs
Al
No it's impossible,fastboot will return an error.
Sent from my C6603 using xda premium
gm007 said:
No it's impossible,fastboot will return an error.
Sent from my C6603 using xda premium
Click to expand...
Click to collapse
Yes true but then again why does the Sony bootloader unlock site still provide an unlock code for locked bootloader xperia z's? This implies that the unlock code is used by Sony technicians to unlock bootloaders ... it's only a matter of determining what that procedure is .... This is definitely being used by carriers.
Really interested to know this for certain, I just got a Z on o2 UK and am a little disappointed that I can't flash any roms. I don't think I can live with stock for ever! Had previously purchased a (dreadful) bootloader locked xperia play which had the 'bootloader allow unlock' set to 'no' which a helpful guy on here managed to change to a 'yes' for the reasonable sum of £10 but this was using testpoint method which obviously won't work on a Z as it's sealed.
If the answer is definately a no to unlocking the bootloader even 'unofficially' then I think i'll have to send this phone back and try my luck with a different phone (an ugly S4 probably). I really do love this phone but I also love being able to change my roms as often as I like to whatever I like.
In the past a bounty would have attracted some devs to work out a cunning plan but if this is not possible at all then theres no point
Anyone know for sure?
Maybe if you change your customization and download a generic cust. ROM, you could probably unlock the bootloader?
If you backup you data and create an ftf for your current cust, you should be able to restore if it doesn't work.
Use the first guide to get an ftf of your stock ROM.
Second to check what generic customization you'd like to download.
Third to change your customization and download & get the appropriate ftf.
Flash the ftf using flashtool.
Relevant guides:
[NOOBS GUIDE] Create your own stock firmware FTF & Flashtool flashing guide[+ pics]
[INFO] Latest firmware version per customization (region/branding) {18-Jul-2013}
[GUIDE] Download ANY firmware customization from Sony & create an FTF with Flashtool
This is pretty much at your own risk. I'm not sure if this will work either.
Alcatrazx said:
Dear all,
Just as you might already know, not all Xperia Z are blessed with having an unlocked bootloader .... it apparently is something related to the carrier though and not to Sony themselves. As it happens if your bootloader is locked and is NOT unlockable you can still head to the website and get your unlock code by putting in your IMEI.
Now that's weird ...... Now just wondering if the same procedure could be applied to get the device bootloader unlocked ....
Regs
Al
Click to expand...
Click to collapse
The unlock code is generated from the imei number I think, so putting in any imei number will return an unlock code.
Try it.
kgs1992 said:
Maybe if you change your customization and download a generic cust. ROM, you could probably unlock the bootloader?
If you backup you data and create an ftf for your current cust, you should be able to restore if it doesn't work.
Use the first guide to get an ftf of your stock ROM.
Second to check what generic customization you'd like to download.
Third to change your customization and download & get the appropriate ftf.
Flash the ftf using flashtool.
Relevant guides:
[NOOBS GUIDE] Create your own stock firmware FTF & Flashtool flashing guide[+ pics]
[INFO] Latest firmware version per customization (region/branding) {18-Jul-2013}
[GUIDE] Download ANY firmware customization from Sony & create an FTF with Flashtool
This is pretty much at your own risk. I'm not sure if this will work either.
Click to expand...
Click to collapse
One guy claimed he done this but never came out with exact step by step instructions so no proof in this.
I previously tried every combination with no avail. as seen in previous threads about unlocking bootloaders we need alot of work done by a dev who knows what he is doing, sony have really tied up the security on these phones.
jonnycarter said:
One guy claimed he done this but never came out with exact step by step instructions so no proof in this.
I previously tried every combination with no avail. as seen in previous threads about unlocking bootloaders we need alot of work done by a dev who knows what he is doing, sony have really tied up the security on these phones.
Click to expand...
Click to collapse
Well, it was a suggestion, you can try it if you want to.
If it doesn't work, then the only possible way is to somehow flash a bootloader that allows itself to be unlocked and this, I suppose, will require bypassing security.
The bootloader is usually not flashable and flashing an unsigned bootloader is even harder.
Reverse engineering bootloaders requires experience and involves a considerable amount of risk.
And that's only half the struggle. You also need to think about how you're going to flash it onto your phone.
emuni said:
Really interested to know this for certain, I just got a Z on o2 UK and am a little disappointed that I can't flash any roms. I don't think I can live with stock for ever! Had previously purchased a (dreadful) bootloader locked xperia play which had the 'bootloader allow unlock' set to 'no' which a helpful guy on here managed to change to a 'yes' for the reasonable sum of £10 but this was using testpoint method which obviously won't work on a Z as it's sealed.
If the answer is definately a no to unlocking the bootloader even 'unofficially' then I think i'll have to send this phone back and try my luck with a different phone (an ugly S4 probably). I really do love this phone but I also love being able to change my roms as often as I like to whatever I like.
In the past a bounty would have attracted some devs to work out a cunning plan but if this is not possible at all then theres no point
Anyone know for sure?
Click to expand...
Click to collapse
send it back & go shopping at Phones4U... all fones from them are unbranded
PNuT. said:
send it back & go shopping at Phones4U... all fones from them are unbranded
Click to expand...
Click to collapse
I really would but I haggled a good deal with o2, £12 a month cheaper than what phones4u advertised with a free Z.
I am probably going to send it back though, just a shame as I really like this phone! Could always try phones4u and see if they will offer the same deal. I should have really thought about the possibility of permanently locked bootloader before I ordered it, after all the grief I had with my old xperia play.
So it definately can't be changed ever if it's set to disallow bootloader unlock?
emuni said:
I really would but I haggled a good deal with o2, £12 a month cheaper than what phones4u advertised with a free Z.
I am probably going to send it back though, just a shame as I really like this phone! Could always try phones4u and see if they will offer the same deal. I should have really thought about the possibility of permanently locked bootloader before I ordered it, after all the grief I had with my old xperia play.
So it definately can't be changed ever if it's set to disallow bootloader unlock?
Click to expand...
Click to collapse
when i went into P4U they said they would match anything i had seen... worth a try
PNuT. said:
when i went into P4U they said they would match anything i had seen... worth a try
Click to expand...
Click to collapse
So can no devs lend a hand to this issue. A lot of people with Xperia Z's are affected by this issue.
It's all down to the TA partition. If it contains "bootloader unlock allowed = no" then you are screwed. Trying to modify it or flash someone else's TA results in an unrecoverable, permanent HARDBRICK, regardless of what bootloader or kernel is flashed
Sent from my C6603 using xda app-developers app
What if happened to sweeten the pot a little and offer £100 sterling to anyone who can successfully unlock a locked a permanently unlocked bootloader.
I'm on 3 with the bootloader so say permanently locked. If you can unlock it. The money is yours.
£100 via PayPal or direct account transfer.
Sent from my C6603 using xda app-developers app
Kirkymole said:
What if happened to sweeten the pot a little and offer £100 sterling to anyone who can successfully unlock a locked a permanently unlocked bootloader.
I'm on 3 with the bootloader so say permanently locked. If you can unlock it. The money is yours.
£100 via PayPal or direct account transfer.
Sent from my C6603 using xda app-developers app
Click to expand...
Click to collapse
There is an ongoing bounty thread if you would like to post there as well.
http://forum.xda-developers.com/showthread.php?t=2287897&page=39
nice idea!
i'm in with another 50 euros!
deyanimay said:
There is an ongoing bounty thread if you would like to post there as well.
http://forum.xda-developers.com/showthread.php?t=2287897&page=39
Click to expand...
Click to collapse
That's a forum for the T isn't it? I can't see properly as I'm on my phone....
Sent from my C6603 using xda app-developers app
bounty hunters, where are you?
kgs1992 said:
Well, it was a suggestion, you can try it if you want to.
If it doesn't work, then the only possible way is to somehow flash a bootloader that allows itself to be unlocked and this, I suppose, will require bypassing security.
The bootloader is usually not flashable and flashing an unsigned bootloader is even harder.
Reverse engineering bootloaders requires experience and involves a considerable amount of risk.
And that's only half the struggle. You also need to think about how you're going to flash it onto your phone.
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Click to collapse
I would like to point out something. Now I know these two things aren't the same, but I'd like to use it as an example. The Xperia Z's bootloader is locked, obviously lol, I've been modding xboxs and ps3s for a long time, and from that experience I think it can relate to this. Why? Well, from my experiance,on the xbox you can't put a custom dashboard unless you JTAG it, although you can get free games if you flash the chip on the disc drive but that's all. with saying that, it's like saying, you can put custom funcions in the Z but you can't change the ROM. So with the xbox, before you're allowed to flash a custom dashboard, you have to unlock your NAND software, with a ps3 (made by sony lol) you can flash a custom firmware if your on firmware 3.55 but if you're above that, you need an e3 flasher to flash your NOR or NAND chip to downgrade and mod it, one time with the ps3 there was a thing called a E3 Stick, I believe it was called that, i can't remember, and with the e3 stick it wpuld exploit the system cause it was a certain type of board it was build with... So if we'd be able to maybe, find a way to exploit the bootloader, or possibly JTAG it or flash it then I think we'd be able to achieve our goal of putting a custom ROM. The problem with the JTAG or flash theory is that we'd have to open the Xperia Z, so as another theory now, we find a device that we plug into the phone and exploits it to let us flash any ROM we want. just like samsung devices, if the phone gets hard bricked and it doesn't turn on anymore,fried, or if you want to reset the flash count you'd use a JIG to put it into download mode and flash any ROM you want to save the device.
Is there a possible way to unlock on the fly? Like not need a computer? I have the unlockcode
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demon2112 said:
Is there a possible way to unlock on the fly? Like not need a computer? I have the unlockcode
Sent from my C6603 using xda app-developers app
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No. The phone needs to be in fastboot mode to unlock the bootloader. The only way to send commands to the bootloader is via a PC.
Sent from my C6603 using Tapatalk

Bootloader unlock says no but o2 say I can still unlock my bootloader

My bootloader allowed lock says no but o2 on pay monthly say I can still unlock my bootloader. They took my imei number and are processing the lock and I have to wait for a email and this can take 7 working days to process. Has any one else done this? As I'm still in my 14 day peace of mind and might send back but they do say will be able to unlock my bootloader
Edit
Just had a email to unlock my phone to any network so just unlocked and it still says bootloader unlock allowed no
But they said I could, do I just try it?
Sent from my C6603 using xda premium
I hope you have done it like this?
http://forum.xda-developers.com/showthread.php?t=2153261
Took me seven seconds yesterday to get the unlock key on mail
danlivesey said:
My bootloader allowed lock says no but o2 on pay monthly say I can still unlock my bootloader.
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No they don't, the code you have isn't for unlocking the bootloader, just the SIM.
Before even trying to unlock the BL, I'd suggest your TA partition just in case.
Mine also said no at first, but I was still able to unlock it.
Dsteppa said:
Before even trying to unlock the BL, I'd suggest your TA partition just in case.
Mine also said no at first, but I was still able to unlock it.
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Who did you get the phone from? Mine is from Three UK and resolutely does not let me unlock the bootloader. Did you use the Sony method? Which rom etc?
nikc0069 said:
Who did you get the phone from? Mine is from Three UK and resolutely does not let me unlock the bootloader. Did you use the Sony method? Which rom etc?
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Hmm stock Rom unbranded, bought it in the Netherlands. Most people here that bought the same phone aren't able to unlock their BL, maybe I just got lucky. The trick that worked for me was simply rooting the phone.
Dsteppa said:
Hmm stock Rom unbranded, bought it in the Netherlands. Most people here that bought the same phone aren't able to unlock their BL, maybe I just got lucky. The trick that worked for me was simply rooting the phone.
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I think you did just get lucky or you just got a sim free handset by the luck of the draw. Which root method did you use? Someone else posted that they tried a specific combo of roms and two tries to unlock before it worked but never fed back any more info so it is possible there is an exploit somewhere.
nikc0069 said:
I think you did just get lucky or you just got a sim free handset by the luck of the draw. Which root method did you use? Someone else posted that they tried a specific combo of roms and two tries to unlock before it worked but never fed back any more info so it is possible there is an exploit somewhere.
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Used the one I attached, can't really remember the topic.
Need to have USB debugging on.
Cheers. And the exact process? Step by step. I know it is tedious but it may be the tiniest thing (eg when you detached the usb cable or whether the sd card was in) that holds the secret.
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nikc0069 said:
Cheers. And the exact process? Step by step. I know it is tedious but it may be the tiniest thing (eg when you detached the usb cable or whether the sd card was in) that holds the secret.
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Give up chasing it, if it was at all possible then it would have been figured out by now.
nikc0069 said:
Cheers. And the exact process? Step by step. I know it is tedious but it may be the tiniest thing (eg when you detached the usb cable or whether the sd card was in) that holds the secret.
Sent from my C6603 using xda premium
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I really don't remember, since I've unlocked my BL I just flash a zip to get root back.
I firmly believe in Xda being able to make the impossible, possible. And there are no flawless systems. However I get what you mean, and don't think anyone is going to push on it now. Xperia Z is still a great phone and here is hoping the upcoming Google Edition will give us with locked bl more choice.
Sent from my C6603 using xda premium

[Q] Help: Sony Xperia Z1 says cannot unlock bootloader

How can I install a custom ROM without an unlocked bootloader?
My phone says its bootloader cannot be unlocked
Mine too , it's must to be a solution to unlock the bootloader...
No, there is no solution
If it says it cannot be unlocked then it cannot be unlocked
Look in the development section for stock based custom roms that can be installed with a locked bootloader
To my experience it needs to be sim unlocked first in order to be bootloader unlocked. In a Xperia Z it said it couldn't unlock bootloader, i purchased unlock code, got it unlocked and then reflashed stock image. After that the status on "bootloader unlock allowed" was changed to yes.
roobns said:
To my experience it needs to be sim unlocked first in order to be bootloader unlocked. In a Xperia Z it said it couldn't unlock bootloader, i purchased unlock code, got it unlocked and then reflashed stock image. After that the status on "bootloader unlock allowed" was changed to yes.
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Please provide proof of that, because this has never happened before and would be fantastic news
Also, some sim locked phones can have bootloaders unlocked and some sim free phones have bootloaders that cannot be unlocked. SO your logic is wrong.
gregbradley said:
Please provide proof of that, because this has never happened before and would be fantastic news
Also, some sim locked phones can have bootloaders unlocked and some sim free phones have bootloaders that cannot be unlocked. SO your logic is wrong.
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Can't provide proof as 1) the bootloader was already unlocked 2) I don't even have the phone anymore.
I don't know if you find my logic right or wrong it was what happened to MY experience with one phone.
I'm pretty sure devs can give you a technical explanation about why it can or can't happen.
roobns said:
Can't provide proof as 1) the bootloader was already unlocked 2) I don't even have the phone anymore.
I don't know if you find my logic right or wrong it was what happened to MY experience with one phone.
I'm pretty sure devs can give you a technical explanation about why it can or can't happen.
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OK thanks.
I know what the devs will say. They will say it cant happen. This has been talked about ad infinitum across various xperia devices.
Also, if your boot was already unlocked then how did you know the status changed?
Thanks anyway.
gregbradley said:
OK thanks.
I know what the devs will say. They will say it cant happen. This has been talked about ad infinitum across various xperia devices.
Also, if your boot was already unlocked then how did you know the status changed?
Thanks anyway.
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When i got the phone (telcel mexico) it said the bootloader was not allowed to be unlocked.
I purchased an unlock code. Entered the code, unlocked the phone.
I flashed an upgraded FW via FTF
typed *#*#SERVICE#*#* and boom bootloader unlock statys changed to yes
That's how i know the status changed. So basically that's my story. I thought it could work with every device.
@gregbradley maybe the sim unlock method really works to change unlock bootloader status YES..bcs it works for some sony device, and we need to test this on Z1.
http://forum.xda-developers.com/showthread.php?t=1896553
There is nothing in that thread that confirms this. Plus the test point method to unofficially unlock the bootloader was stopped by Sony nearly 2 years ago.
But please, delve into this again if you want. But trust me it is a dead end and does not work. If it was easy as sim unlocking and flashing a ftf do you not think that would have been done by now.
Some seriously good devs have been working on this ever since the test point method was closed.
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