Database Develop

[Q] Flashing ROM + Bootloader Xperia T

Hey guys, I am fairly new to the android phones, (recently came from an iPhone) but I had heard so much about the freedoms with the Android os so I decided to switch.
I purchased the Sony Xperia T (LT30a) locked on the Bell mobility LTE network. I have really wanted to unlock the bootloader, so when I went in to check it said "Bootloader Unlock Allowed: NO". after some searching I read that it was my carrier preventing the bootloader from being unlocked, and that if I followed the following simple steps, it would change the message to :"Bootloader Unlock Allowed: YES". so here is what I did:
1. Flashed a Generic firmware to my phone (ICS it was a uk generic) which then changed my model number in "About phone" from LT30a to LT30p and removed all the bell branding.
2. Using an IMEI number, i was able to get an unlock code and unlocked the phones sim card to work on any network, and have tested and it does work.
the problem I am having is that even after doing this, the bootloader is still "locked" and can not be unlocked. I have taken a look at the methods for the test pin, but that involves removing the battery to view the motherboard, which sucks because this phone the battery is not removable. if anyone know a free or paid way to unlock the bootloader on the Xperia T LT30a or LT30p models, please let me know! thanks.

I dont know where you read that, but it is wrong and there is no way to change that message.
If it says no, then your bootloader can not be unlocked.
Its not Sony's fault, its not googles fault, its Bells fault for being a dev unfriendly provider.
Test point method will not work even if we could remove the battery, that loophole has been closed in 2012 devices.

gregbradley said:
I dont know where you read that, but it is wrong and there is no way to change that message.
If it says no, then your bootloader can not be unlocked.
Its not Sony's fault, its not googles fault, its Bells fault for being a dev unfriendly provider.
Test point method will not work even if we could remove the battery, that loophole has been closed in 2012 devices.
Click to expand...
Click to collapse
ok well thank you very much! I guess my next question is.. is there any way at all to install a custom ROM such as cyanogen mod 10 ? or if you know of any better ones while my bootloader is locked?

Robe8691 said:
ok well thank you very much! I guess my next question is.. is there any way at all to install a custom ROM such as cyanogen mod 10 ? or if you know of any better ones while my bootloader is locked?
Click to expand...
Click to collapse
You can only install stock based custom roms because you wony be able to flash a custom kernel with a locked bootloader. Therefore there is no hope for cyanogenmod, AOKP or MUIU
There are several in the Dev section to choose from, ranging from early ICS firmwares to the latest JB firmware.
I dont recommend Roms (Even my own) as choosing a rom should be a personal thing, but the I am currently on Timin8rs rooted and deodexed JB rom which you can flash.
You will need to root your phone in order to flash a recovery, then flash the .zip for the rom using that recovery.
Find all instructions for doing that in the All in one thread. Its the first thread in the Q&A section.
good luck and if you need extra help after reading up on what you need to do then ask. But remember to read up first!

gregbradley said:
You can only install stock based custom roms because you wony be able to flash a custom kernel with a locked bootloader. Therefore there is no hope for cyanogenmod, AOKP or MUIU
There are several in the Dev section to choose from, ranging from early ICS firmwares to the latest JB firmware.
I dont recommend Roms (Even my own) as choosing a rom should be a personal thing, but the I am currently on Timin8rs rooted and deodexed JB rom which you can flash.
You will need to root your phone in order to flash a recovery, then flash the .zip for the rom using that recovery.
Find all instructions for doing that in the All in one thread. Its the first thread in the Q&A section.
good luck and if you need extra help after reading up on what you need to do then ask. But remember to read up first!
Click to expand...
Click to collapse
thank you very much! hopefully sometime in the near future they come out with a way to fix this problem, and believe me, I do not blame sony at all for this

Sorry for the double post! But I just wanted to say, that if anyone needs help testing different roms and/or ways of unlocking a locked bootloader, I do have a sim unlocked xperia T and just wanted to throw this out, but if sony does not "perma lock" the bootloader, and if it is infact the carrier, then would this not prove that it is sonething in the firmware? I spoke with my sister who is a manager for a bell store here, acording to her, Bell is not authorized to open, or attempt to fix this phone, it is simply sent to sony for repairs.. Just makes me wonder because if Bell can not open the phone, then they must have used some sort of software.. I have always thought of software as "semi-permenant" that it can be reversed , and that its only a matter of figuring out how to reverse it?
Sent from my LT30p using xda app-developers app

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.
Click to expand...
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
Sent from my C6603 using xda app-developers app

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
Click to expand...
Click to collapse
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

[Q] Factory locked bootloader

Just received the XSP as an upgrade on T-Mobile UK and was disappointed to discover via the service menu that the bootloader is unlockable. Forgive me for asking but does this mean that there is absolutely no chance that at any point in the future I will be able to unlock it? I would like to use custom roms and want to know if I kight as well look for a new phone. This was never a problem on my old Optimus Black.
Thanks in advance.

Wallly said:
Just received the XSP as an upgrade on T-Mobile UK and was disappointed to discover via the service menu that the bootloader is unlockable. Forgive me for asking but does this mean that there is absolutely no chance that at any point in the future I will be able to unlock it? I would like to use custom roms and want to know if I kight as well look for a new phone. This was never a problem on my old Optimus Black.
Thanks in advance.
Click to expand...
Click to collapse
Hey fella, I'm same phone, same network and same country.
As I understand it Doomlords software will in V16 provide root for our phone. :victory:

venters said:
Hey fella, I'm same phone, same network and same country.
As I understand it Doomlords software will in V16 provide root for our phone. :victory:
Click to expand...
Click to collapse
Praise the (Doom)Lord! Will this allow us to unlock the boot then andflash custom roms?

Just to make it clear bootloader is locked this means no custom kernel which might mean custom ROMs are out ie. Cm,akop,PAC etc
You will be able to root using doomlord exploit and in time will get cwm for locked bootloader so we be able to use modded stock ROMs.
As it stands only root is available for locked bootloader hope this helps
Sent from my C5302 using xda premium

nfmplo and
zolaisugly said:
Just to make it clear bootloader is locked this means no custom kernel which might mean custom ROMs are out ie. Cm,akop,PAC etc
You will be able to root using doomlord exploit and in time will get cwm for locked bootloader so we be able to use modded stock ROMs.
As it stands only root is available for locked bootloader hope this helps
Sent from my C5302 using xda premium
Click to expand...
Click to collapse
Great, thanks. This is exactly what I needed to know. Guess I'll have to be patient then..

There is a way to unlock your bootloader. You must get a SIM unlock code, unlock your SP and send an email to Sony with some data like Imei, unlock code, etc. Then a messenger will be sent to pick your phone and lucky, Sony will unlock your phone.

lanluckez said:
There is a way to unlock your bootloader. You must get a SIM unlock code, unlock your SP and send an email to Sony with some data like Imei, unlock code, etc. Then a messenger will be sent to pick your phone and lucky, Sony will unlock your phone.
Click to expand...
Click to collapse
this may be true but it only works with bootloader that is allowed, he states in op that his bootloader is unlockable.
service menu shows if you can or not open bootloader, i am on 3 and my bootloader is locked have tried with sony code but get message not available.

zolaisugly said:
this may be true but it only works with bootloader that is allowed, he states in op that his bootloader is unlockable.
service menu shows if you can or not open bootloader, i am on 3 and my bootloader is locked have tried with sony code but get message not available.
Click to expand...
Click to collapse
Few days ago sent an email to Sony asking about this issue. Here in Spain there was a global complaint from Xperia U users asking for open the possibility of unlock their bootloaders: not to unlock it but to change the "unlockable" state of the phone. After the debate, Sony says people could send their phones to Sony attaching the respective unlock code with which they'd unlocked (SIM Unlock). Then Sony would send the telephones with the bootloader unlockable.
PS: Maybe he meant "not unlockable" instead "unlockable". If it's unlockable then he doesn't have any problem!

lanluckez said:
Few days ago sent an email to Sony asking about this issue. Here in Spain there was a global complaint from Xperia U users asking for open the possibility of unlock their bootloaders: not to unlock it but to change the "unlockable" state of the phone. After the debate, Sony says people could send their phones to Sony attaching the respective unlock code with which they'd unlocked (SIM Unlock). Then Sony would send the telephones with the bootloader unlockable.
PS: Maybe he meant "not unlockable" instead "unlockable". If it's unlockable then he doesn't have any problem!
Click to expand...
Click to collapse
Yes, I meant *not* unlockable. I actually live in Spain so this service from Sony would be very useful, could you tell me how I can do this?

Wallly said:
Yes, I meant *not* unlockable. I actually live in Spain so this service from Sony would be very useful, could you tell me how I can do this?
Click to expand...
Click to collapse
Yeah, mate. You have to send a message to Sony saying you've (sim) unlocked your phone and you want to unlock your bootloader. They will send you all the information you need to go through with the process.

[Q] Anyone have an XSP from EE/Orange/TMobile UK?

If anyone has an Xperia SP from Orange, T-Mobile or EE in the UK do you happen to know if your boot loader is permanently locked? I know the phone's probably sim-locked but I'm less worried about that.
Thanks!

MagicMagicD said:
If anyone has an Xperia SP from Orange, T-Mobile or EE in the UK do you happen to know if your boot loader is permanently locked? I know the phone's probably sim-locked but I'm less worried about that.
Thanks!
Click to expand...
Click to collapse
Yes, I have.
And the answer is probably.
Go to dialler, *#*#7378423#*#* ->Service Info ->Configuration. This will tell you if bootloader unlock is allowed. (it will probably say No) go back, then select SIM Lock and you'll probably find [x] Network 5.
This means it is simlocked, and you have 5 attempts left to unlock it.
However, you should be able to use a T-Mobile, Orange, EE and possibly a Virgin SIM in it.

MagicMagicD said:
If anyone has an Xperia SP from Orange, T-Mobile or EE in the UK do you happen to know if your boot loader is permanently locked? I know the phone's probably sim-locked but I'm less worried about that.
Thanks!
Click to expand...
Click to collapse
Mine is from T-Mobile UK and yes it is sim locked and the bootload unlock allowed is a 'no' under the service menu.

Thanks all.
I only have an Xperia U at the moment, but it's sim-free and easily unlocked. I'm currently looking at upgrade options but I don't want to lose the flexibility I have with being able to flash custom kernels, etc. in the future if I get bored with the stock rom or, more likely, Sony decides to stop supporting it.

MagicMagicD said:
Thanks all.
I only have an Xperia U at the moment, but it's sim-free and easily unlocked. I'm currently looking at upgrade options but I don't want to lose the flexibility I have with being able to flash custom kernels, etc. in the future if I get bored with the stock rom or, more likely, Sony decides to stop supporting it.
Click to expand...
Click to collapse
In that case, go to carphonewarehouse, all their phones come unlocked.
Sent from my C5303 using Tapatalk 4

[Q] Kit Kat Update with Locked Bootloader!

Good Day!, i purchase a z1 on Claro El salvador, phone is still runing 4.2.2 and theres no signs on an update and of course the bootloader is locked, can i update to kit kiat just by flashing the firmware using flash tool, or im just **** up? :s

sFranKv said:
Good Day!, i purchase a z1 on Claro El salvador, phone is still runing 4.2.2 and theres no signs on an update and of course the bootloader is locked, can i update to kit kiat just by flashing the firmware using flash tool, or im just **** up? :s
Click to expand...
Click to collapse
Download first the flashtool then download ftf filein the general section..be sure to download the correct model number..you can update to 4.4 by this.. What country are you from?

23852392 9
lelouch20 said:
Download first the flashtool then download ftf filein the general section..be sure to download the correct model number..you can update to 4.4 by this.. What country are you from?
Click to expand...
Click to collapse
El Salvador, model number is c6902, so its doesnt matter if i have a locked bootloader i can just flash any ftf file?

Yup..but make sure that you only flash c6902 ftf..or you will problems later...in locked bootloaders you cant flash custom kernels..thats it..as long as it is stock you can flash it..

lelouch20 said:
Yup..but make sure that you only flash c6902 ftf..or you will problems later...in locked bootloaders you cant flash custom kernels..thats it..as long as it is stock you can flash it..
Click to expand...
Click to collapse
Great!, tnx a lot for the help!.

sFranKv said:
Great!, tnx a lot for the help!.
Click to expand...
Click to collapse
Happy to help mate...

Branded phone. on stock 14.2.a.1.136
I have a question, Would my phone Imei number set itself to 000000000 if I flash the kitkat rom for my device? I tried flashing a stock rom on another build number which was unbranded and that resulted in no service, no connection to my sim manufacturer or able to look up the kernel, nothing worked. So please reply to my post. My phone is bound for 12 months and I would really like to flash a custom rom like Cyanogen on my device. Is there a way to do this or do I have to wait for a year?
After searching the xda forums I finally found a way to get my phone service up and running again.
My phone is Sony Xperia z1 build 6903 Stock 14.2.a.1.136. bound to a norwegian phone service named Telenor.
Any help or tips are much appreciated, I would really like to avoid encountering the same problem again it costed me alot of grief and will not continue to flash or do anything regarding my phone until someone would be kind enough to point me towards the how to's. Thank you for reading

The "how to's" are very well sign posted in the general and development threads, they are stickies
No, you will not lose IMEI

Thx for replying to my post. one up
gregbradley said:
The "how to's" are very well sign posted in the general and development threads, they are stickies
No, you will not lose IMEI
Click to expand...
Click to collapse
I flashed a rom on saturday, stock unbranded. resulted in my IMEI settings to dissappear. They came reapeared after i flashed 290 build back on my phone.
can I ask you to please point me to the right thread regarding this problem?

floezz said:
I flashed a rom on saturday, stock unbranded. resulted in my IMEI settings to dissappear. They came reapeared after i flashed 290 build back on my phone.
can I ask you to please point me to the right thread regarding this problem?
Click to expand...
Click to collapse
Flash a 534 FTF
instal dual recovery
flash SuperSU from chainfire
flash a prerooted 4,4 rom
21 times this week.....

floezz said:
I have a question, Would my phone Imei number set itself to 000000000 if I flash the kitkat rom for my device? I tried flashing a stock rom on another build number which was unbranded and that resulted in no service, no connection to my sim manufacturer or able to look up the kernel, nothing worked. So please reply to my post. My phone is bound for 12 months and I would really like to flash a custom rom like Cyanogen on my device. Is there a way to do this or do I have to wait for a year?
After searching the xda forums I finally found a way to get my phone service up and running again.
My phone is Sony Xperia z1 build 6903 Stock 14.2.a.1.136. bound to a norwegian phone service named Telenor.
Any help or tips are much appreciated, I would really like to avoid encountering the same problem again it costed me alot of grief and will not continue to flash or do anything regarding my phone until someone would be kind enough to point me towards the how to's. Thank you for reading
Click to expand...
Click to collapse
you cant use cyanogen rom bcoz it needs a custom kernel, and for you to be able to flash custom kernel you must have an unlocked bootloader..
im not an expert here but i think you cant unlock your bootloader if it is simlocked to your operator
you can only use modified stock rom as mention here by "gregbradley"
so i think you'll have to wait for 12 months for you to flash cyanogen based rom

Sim lock had nothing to do with boot loader unlock. Some Sim locked devices can be unlocked, some Sim free devices can not be unlocked
Sent from my C6903 using XDA Premium 4 mobile app

Well i already have the sim unlock code. so i Will still use the same sim card, but how do warp into the sim unlock mode? I tried setting in another sim card but the phone just asked me to insert the pin for that as well. Then again I would love to unlock my phone and use the same sim card, only difference the phone will be totally mine. So i can flash whatever rom and kernel that suits me. I have been using cyanogen since day one and would love continue to do so.

floezz said:
Well i already have the sim unlock code. so i Will still use the same sim card, but how do warp into the sim unlock mode? I tried setting in another sim card but the phone just asked me to insert the pin for that as well. Then again I would love to unlock my phone and use the same sim card, only difference the phone will be totally mine. So i can flash whatever rom and kernel that suits me. I have been using cyanogen since day one and would love continue to do so.
Click to expand...
Click to collapse
Your SIM unlock code will not unlock the bootloader, so you will still be unable to flash custom kernels.
Please read what I have said, SIM unlock has nothing to do with Bootloader unlock.
It is true most branded phones have bootloaders which cannot be unlocked and most SIM free phones canbe unlocked. But that is not an exclusive rule.
If you cannot unlock it now, entering a SIM unlock code will NOT unlock your bootloader.
To enter your SIM unlock code, contact your provider who would have given it to you.

delete
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You may want to not show your IMEI number to the world.
You can now goto the Sony website and unlock your bootloader using the official way. You can do this whilst you are still SIM locked, proving my point that SIM lock has nothing to do with bootloader unlock

What possible harm can be done with my imei number? Well sim lock certainly voids the service connection flashing builds earlier than 290.
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floezz said:
What possible harm can be done with my imei number?
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If you don't know, then don't worry about it....but now anyone in the world can block your phone
Well sim lock certainly voids the service connection flashing builds earlier than 290.
Sent from my C6903 using XDA Premium 4 mobile app
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That's not the SIM lock that does that. It does it on my phone and its SIM free.

Ok
---------- Post added at 12:38 PM ---------- Previous post was at 12:28 PM ----------
gregbradley said:
If you don't know, then don't worry about it....but now anyone in the world can block your phone That's not the SIM lock that does that. It does it on my phone and its SIM free.
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I deleted the post, now final question deleting the sim lock literally will then not unlock my bootloader, that I am able to do as of now. But Completely deleting the sim lock will then leave my phone at my disposal, right? Since I have the sim unlock code, but I need to know how to remove the sim lock from my phone, cause using another sim card, which is not from the same company does not jump start the unlock mode.
Tell me if I got everything right. when I insert the sim unlock the sim lock will be completely gone from my phone right? regardless of what kernel or rom I use? and it can never come back?

floezz said:
Ok
---------- Post added at 12:38 PM ---------- Previous post was at 12:28 PM ----------
I deleted the post, now final question deleting the sim lock literally will then not unlock my bootloader, that I am able to do as of now. But Completely deleting the sim lock will then leave my phone at my disposal, right? Since I have the sim unlock code, but I need to know how to remove the sim lock from my phone, cause using another sim card, which is not from the same company does not jump start the unlock mode.
Tell me if I got everything right. when I insert the sim unlock the sim lock will be completely gone from my phone right? regardless of what kernel or rom I use? and it can never come back?
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Click to collapse
Yes, just ask the provider of the sim unlock code how to enter it. It should be your network provider. SIM locks or restrictiosn are nothing to do with firmware, android versions or kernels.
Your bootloader can be unlocked now by visiting the official sony website.
Please do not confuse bootloader and sim lock. they are two different issues and you keep talking as if they are related.