Upgrade/downgrade... - Xperia Z1 Q&A, Help & Troubleshooting

Hi,
I am thinking of flashing the 4.4 upgrade to my z1 to see if the Bluetooth issues that I had on 4.3 will be resolved. My question is -
If I upgrade to 4.4 and I am still having Bluetooth issues, will I have any problems downgrading back to 4.4.2?
Any help will be appreciated!
P.S. I don't need to have root access!

Yes because you cannot downgrade from 4.4 to 4.4.2, they are the same
If you mean downgrading to 4.2 or 4.3, it should be fine (AFAIK)
Remember there was the loss of IMEI going from 4.3 to 4.2, so I suggest only downgrading to 4.3

gregbradley said:
Yes because you cannot downgrade from 4.4 to 4.4.2, they are the same
If you mean downgrading to 4.2 or 4.3, it should be fine (AFAIK)
Remember there was the loss of IMEI going from 4.3 to 4.2, so I suggest only downgrading to 4.3
Click to expand...
Click to collapse
Hi gregbradley
Thank you for your reply,,,
Sorry I meant downgrade from 4.4.2 to 4.2.2...
I have tried the upgrade to both .290 and .136 (4.3) and back again to .257 (4.2.2) and did not suffer any IMEI loss.. Does this mean that I was just lucky or?
Regards,
Alan

nalab1 said:
Hi gregbradley
Thank you for your reply,,,
Sorry I meant downgrade from 4.4.2 to 4.2.2...
I have tried the upgrade to both .290 and .136 (4.3) and back again to .257 (4.2.2) and did not suffer any IMEI loss.. Does this mean that I was just lucky or?
Regards,
Alan
Click to expand...
Click to collapse
Well, if there was no problem, there was no problem
You should be able to downgrade so give it a go and see

gregbradley said:
Well, if there was no problem, there was no problem
You should be able to downgrade so give it a go and see
Click to expand...
Click to collapse
Hi gregbradley,
Thank-you for your reply..
I will! BTW - I am on Vodafone in the UK have you got any suggestions as to what ftf I should flash? When I flashed the .136 ftf I used this -
C6903_14.2.A.1.136_Generic BAL.ftf from the ftf mega collection in XDA...
Regards,
Alan

nalab1 said:
Hi gregbradley,
Thank-you for your reply..
I will! BTW - I am on Vodafone in the UK have you got any suggestions as to what ftf I should flash? When I flashed the .136 ftf I used this -
C6903_14.2.A.1.136_Generic BAL.ftf from the ftf mega collection in XDA...
Regards,
Alan
Click to expand...
Click to collapse
Any will do, I started off life on the UK Vodafone, now I am on the commercial and journalistic one

Hi nalab! I also had this question since last night and I really wanna go back to 4.3 (136), i just wanna know did you wipe data when you flashed the lower firmware? Thanks!
Sent from my C6903 using XDA Premium 4 mobile app

cyrom said:
Hi nalab! I also had this question since last night and I really wanna go back to 4.3 (136), i just wanna know did you wipe data when you flashed the lower firmware? Thanks!
Sent from my C6903 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
Hi!
Yes, I wiped everything when I went back... I went from 4.3 to 4.2.2 tho...

nalab1 said:
Hi!
Yes, I wiped everything when I went back... I went from 4.3 to 4.2.2 tho...
Click to expand...
Click to collapse
Oh I see. Thanks! I'm sticking with kitkat for a while.
Sent from my C6903 using XDA Premium 4 mobile app

cyrom said:
Oh I see. Thanks! I'm sticking with kitkat for a while.
Sent from my C6903 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
Which ftf did you use for kitkat?

nalab1 said:
Which ftf did you use for kitkat?
Click to expand...
Click to collapse
I have updated via pcc. Cv's 1276-7935 for philippines. I hate this sd card restrictions.
Sent from my C6903 using XDA Premium 4 mobile app

I'm on generic UK. Should I update to Vodafone UK or just wait until I can update via Pcc?
Sent from my C6903 using xda app-developers app

ady_seray said:
I'm on generic UK. Should I update to Vodafone UK or just wait until I can update via Pcc?
Sent from my C6903 using xda app-developers app
Click to expand...
Click to collapse
That's your choice. Vodafone UK will come with some bloat, but you can remove that with root.

Related

is it possible to root the xperia tx 4.2.2

I am wondering if I should update my xperia tx 4.1.2 rooted to the latest 4.2.2 version
is it possible to root the 4.2.2 ? OTA update for some reason is not working with my device with the super user ota survival function is checked
Thanks for your help
Question is there 4.2.2 for TX right now?
Sent from my LT25i using xda premium
Yes , ota update has roll out in Hong kong
televisible said:
Yes , ota update has roll out in Hong kong
Click to expand...
Click to collapse
ru sure it is 4.2.2?
What!!? Really? Please post ota notification screen shot.
Sent from my LT29i using xda app-developers app
Its still 4.1.2.. Not 4.2.2
Sent from my LT29i using xda premium
I thought it was 4.2.2 , thanks for correcting me . Still I would like to know will rooting work on it .it's build nos is 9.1.B.1.67
televisible said:
I thought it was 4.2.2 , thanks for correcting me . Still I would like to know will rooting work on it .it's build nos is 9.1.B.1.67
Click to expand...
Click to collapse
Yup it can be rooted.. try to search on doomlord thread..
here is the link http://forum.xda-developers.com/showthread.php?p=42813428
Sent from my LT29i using xda premium
icebxboy said:
Yup it can be rooted.. try to search on doomlord thread..
here is the link http://forum.xda-developers.com/showthread.php?p=42813428
Sent from my LT29i using xda premium
Click to expand...
Click to collapse
root does not work , my phone keep restarting after the root,
televisible said:
root does not work , my phone keep restarting after the root,
Click to expand...
Click to collapse
Try to read on doomlords comment about that issue on the thread..
Sent from my LT29i using xda premium

[Q] Root Z1 4.3 without unlocking bootloader?

Is it possible?
Not yet.
Sent from my C6903 using XDA Premium 4 mobile app
I waiting for that day.
Yes it is possible, just not on 4,3, only on 4.2
taranfx said:
Is it possible?
Click to expand...
Click to collapse
Impossible ^_^
Brianlymtb said:
Impossible ^_^
Click to expand...
Click to collapse
For now...
Sent from my C6903 using XDA Premium 4 mobile app
gaboh24 said:
For now...
Sent from my C6903 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
..on 4.3..
eclyptos said:
..on 4.3..
Click to expand...
Click to collapse
I think it is the funny now ^_^
Help a brother out
When the Z1 first launched, I was able to root the device.
I'm ignorant enough to not know if I had unlocked the bootloader.
General forum research tells me that if I'm not sure if I unlocked the bootloader, it means I didn't unlock the bootloader.
I updated my Z1 (C9606) to 14.1.G.2.257 Build.
I'm still running Android 4.2.2
Is there a way to root device without unlocking?
If so, could someone point towards the thread I need to follow?
thanks!
Hobbes2099 said:
When the Z1 first launched, I was able to root the device.
I'm ignorant enough to not know if I had unlocked the bootloader.
General forum research tells me that if I'm not sure if I unlocked the bootloader, it means I didn't unlock the bootloader.
I updated my Z1 (C9606) to 14.1.G.2.257 Build.
I'm still running Android 4.2.2
Is there a way to root device without unlocking?
If so, could someone point towards the thread I need to follow?
thanks!
Click to expand...
Click to collapse
Hello,
flash back to .534 with flashtool then root and custom recovery your device and put a custom pre rootet rom on.I think that is the only solution also the same point as the threat starter asks for you only can use pre rootet roms for now.
best regards and wishes,
Nico
LiquidNitrogen1412 said:
Hello,
flash back to .534 with flashtool then root and custom recovery your device and put a custom pre rootet rom on.I think that is the only solution also the same point as the threat starter asks for you only can use pre rootet roms for now.
best regards and wishes,
Nico
Click to expand...
Click to collapse
+1
We are all at the same point i'm going to try vroot root 360 or something like that today any of you who can confirm it's not working
If so too bad then i'm just going to wait for the ota 4.3 update (t-mobile netherlands bramded device) amd hope for a root method later
LiquidNitrogen1412 said:
Hello,
flash back to .534 with flashtool then root and custom recovery your device and put a custom pre rootet rom on.I think that is the only solution also the same point as the threat starter asks for you only can use pre rootet roms for now.
best regards and wishes,
Nico
Click to expand...
Click to collapse
What if rolled back to .534, custom recovered, rooted and then tried to flash .290 (JB 4.3)?
Has anyone tried this?
Is there any way of getting stock 4.3 rooted?
Sent from my Xperia Z1 using Tapatalk
Hobbes2099 said:
What if rolled back to .534, custom recovered, rooted and then tried to flash .290 (JB 4.3)?
Has anyone tried this?
Is there any way of getting stock 4.3 rooted?
Sent from my Xperia Z1 using Tapatalk
Click to expand...
Click to collapse
No.
Wysłane z mojego C6903 przy użyciu Tapatalka

When will my Z1 get 4.3/4.4 update?

Hi,
I was wondering when my unrooted Z1 will get a new android update. I live in UK. Anyone have any info?
Sent from my C6903 using XDA Premium 4 mobile app
Lewiswatson99 said:
Hi,
I was wondering when my unrooted Z1 will get a new android update. I live in UK. Anyone have any info?
Sent from my C6903 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
Only Sony and/or your provider can confirm that, but even then it would be nice if you could tell us what version are you on now? You don't even tell us that so how are we meant to help you......
Oh sorry! Haha I'm on 4.2.2 at the moment. When do you think the UK will get a 4.3/4.4 update
Sent from my C6903 using XDA Premium 4 mobile app
Lewiswatson99 said:
Oh sorry! Haha I'm on 4.2.2 at the moment. When do you think the UK will get a 4.3/4.4 update
Sent from my C6903 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
Why don't you just use Flashtool to get it to your phone using one of the available ftf's ?
Here is a video on how to do that:
No I don't want to void my warranty by rooting. I am just wondering when I might get the update. Thanks anyways for your helps
Sent from my C6903 using XDA Premium 4 mobile app
Lewiswatson99 said:
No I don't want to void my warranty by rooting. I am just wondering when I might get the update. Thanks anyways for your helps
Sent from my C6903 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
Flashing with flashtool don't need root acces and it can't be detected.
You have to read before ask,you will have a reponse faster.
Read that ,if your Z1 is not on the list wait a week or two or flash with Flashtool
I would update through the PC companion. Many people seem to have encountered problems flashing with flashtool on this update. It was taking forever for the ota for me as well
Sent from my C6903 using Tapatalk
gregbradley said:
Only Sony and/or your provider can confirm that, but even then it would be nice if you could tell us what version are you on now? You don't even tell us that so how are we meant to help you......
Click to expand...
Click to collapse
When the Z1 first announcement it come with 4.2.2 already. So if he ask for 4.3 or 4.4 that meant he on 4.2.2 already.
reminder, there is no UK generic unbranded FTFs yet...
shem2409 said:
Why don't you just use Flashtool to get it to your phone using one of the available ftf's ?
Click to expand...
Click to collapse
because there is NO UK Unbranded Generic.. and the official channels are my preferred route too.
seamonkey420 said:
because there is NO UK Unbranded Generic.. and the official channels are my preferred route too.
Click to expand...
Click to collapse
Whether you use UK generic or any other generic one does not make a difference whatsoever, but it's up to you.
I have never encountered any problems when using Flashtool. Just make sure to use the most recent version.
The 4.3 is avaliable so if you use OTA or SEUS you get it.
As for rooting, it doesnt avoid your warranty unless you remove the root and install a clean version when you deliver the device for repair or replace it.
Only thing that avoid the warranty is unlocking the bootloader.
Keep your .257 rooted version and wait for a rooted locked version for 4.3.
Btw there will come a hotfix version in January (newer 4.3) for Z1.
4.4 will come April/May i think...
shem2409 said:
Whether you use UK generic or any other generic one does not make a difference whatsoever, but it's up to you.
I have never encountered any problems when using Flashtool. Just make sure to use the most recent version.
Click to expand...
Click to collapse
i've done my share of android modding/roms/etc.. however i like my region and stock rom the uk generic unbranded is and in turn would rather wait it out.. as hard as it is.. hehe.
You can check here scavenger-ch/sonyupdate/ (replace - with .)
Just got the update on my phone today, so no need to use the flash tool or root. Thanks guys anyways
Sent from my C6903 using XDA Premium 4 mobile app
seamonkey420 said:
because there is NO UK Unbranded Generic.. and the official channels are my preferred route too.
Click to expand...
Click to collapse
THere is,
http://forum.xda-developers.com/showthread.php?t=2469191
Under C6903 Unbranded/Generic scroll down to C6903 14.2.A.0.290 Generic UK 1276-0875
this has been out for quite a few days now ...

Rooting 4.3 without downgrading

Can I root my Z1 having the 4.3 version without downgrading? If so please tell me. I downgraded yesterday and ended up not having having any signal and my imei was a bunch of zero's.
If you know a fix for the downgrading problem that is fine too, as long as I can root it preferably tonight.
Thank you in advance
Sent from my C6903 using xda app-developers app
Hanozy said:
Can I root my Z1 having the 4.3 version without downgrading? If so please tell me. I downgraded yesterday and ended up not having having any signal and my imei was a bunch of zero's.
If you know a fix for the downgrading problem that is fine too, as long as I can root it preferably tonight.
Thank you in advance
Sent from my C6903 using xda app-developers app
Click to expand...
Click to collapse
Whilst downgrading, you have to downgrade to .257 and then to .534. The problem with disappearing IMEI happens only if you downgrade directly to .534.
If you have an unlockable bootloader you could unlock your bootloader and then flash a custom kernel.
If you are on locked bootloader or would prefer to not unlock the bootloader, the only way is to downgrade all the way to .534, root, install recovery and then prerooted firmware.
Could you walk me through the process of downgrading twice without unlocking the bootloader, thanks.
Sent from my C6903 using xda app-developers app
Hanozy said:
Could you walk me through the process of downgrading twice without unlocking the bootloader, thanks.
Sent from my C6903 using xda app-developers app
Click to expand...
Click to collapse
Check this video:
http://forum.xda-developers.com/showthread.php?t=2607987
It works like a charm :thumbup:
Sent from my Rooted SGPT12 using Tapatalk HD
Hanozy said:
Could you walk me through the process of downgrading twice without unlocking the bootloader, thanks.
Sent from my C6903 using xda app-developers app
Click to expand...
Click to collapse
Will try it when I get home, thank you. How do I go about backing up my phone, the apps and stuff.
Sent from my C6903 using xda app-developers app
Hanozy said:
Will try it when I get home, thank you. How do I go about backing up my phone, the apps and stuff.
Sent from my C6903 using xda app-developers app
Click to expand...
Click to collapse
In the third comment on the thread you will find the answer:
http://forum.xda-developers.com/showthread.php?t=2607987
Thank you for your answer, is there a way to do this if I don't have an SDcard?
shem2409 said:
Whilst downgrading, you have to downgrade to .257 and then to .534. The problem with disappearing IMEI happens only if you downgrade directly to .534.
If you have an unlockable bootloader you could unlock your bootloader and then flash a custom kernel.
If you are on locked bootloader or would prefer to not unlock the bootloader, the only way is to downgrade all the way to .534, root, install recovery and then prerooted firmware.
Click to expand...
Click to collapse
I made the mistake of doing this last night and now my phone tells me I have an invalid sim... anyone one know how to solve that?
I solved it by flashing back to my stock rom, the . 290 one.
Sent from my C6903 using xda app-developers app
Hanozy said:
I solved it by flashing back to my stock rom, the . 290 one.
Sent from my C6903 using xda app-developers app
Click to expand...
Click to collapse
Many thanks, I'll give that a try once I find a generic UK 290 ftf. Can only find the 534 and 257 at the moment...

[Q] Phone doesn't do anything, only backlight is on

Hi. My friend has an SP, it's stock and unrooted, and a few weeks ago the phone started to hang on black screen with backlight on. Of course he tried to reset the phone with the button under the battery, with no success. He returned it to the store, they only reflashed the stock rom, it worked for a day now it's the same. Has anybody find any solution to this? I tried to search for exact similar problems, but I couldn't find any with proper answers. I think he is on 4.3. Thanks for any help!
LilProphet said:
Hi. My friend has an SP, it's stock and unrooted, and a few weeks ago the phone started to hang on black screen with backlight on. Of course he tried to reset the phone with the button under the battery, with no success. He returned it to the store, they only reflashed the stock rom, it worked for a day now it's the same. Has anybody find any solution to this? I tried to search for exact similar problems, but I couldn't find any with proper answers. I think he is on 4.3. Thanks for any help!
Click to expand...
Click to collapse
have you tried to flash stock 4.1.2 with flashtool..?
ParaSense. said:
have you tried to flash stock 4.1.2 with flashtool..?
Click to expand...
Click to collapse
no, I only saw it yesterday and tried to fix it for about an hour. do you suggest me to do that?
Sent from my LG-P760 using xda premium
LilProphet said:
no, I only saw it yesterday and tried to fix it for about an hour. do you suggest me to do that?
Sent from my LG-P760 using xda premium
Click to expand...
Click to collapse
yes.. flash stock 4.1.2 ftf with flash tool.. if that not solve your problem then 99% is hardware issue..
btw i tell you to flash 4.1.2 and not 4.3 cause 4.3 is full of bugs..
You can follow this guide http://forum.xda-developers.com/showthread.php?t=2658952 to do this... but i prefer u to install 4.1.2 (12.0.A.1.257 or 12.0.A.2.254).. if you install 12.0.A.1.257 then update to 12.0.A.2.254 with your phone not with sus.. cause with sus it will go to buggy 4.3 (12.1.A.0.266).. for 4.3 this week i think sony will release new bugfixing version
ParaSense. said:
yes.. flash stock 4.1.2 ftf with flash tool.. if that not solve your problem then 99% is hardware issue..
btw i tell you to flash 4.1.2 and not 4.3 cause 4.3 is full of bugs..
You can follow this guide http://forum.xda-developers.com/showthread.php?t=2658952 to do this... but i prefer u to install 4.1.2 (12.0.A.1.257 or 12.0.A.2.254).. if you install 12.0.A.1.257 then update to 12.0.A.2.254 with your phone not with sus.. cause with sus it will go to buggy 4.3 (12.1.A.0.266).. for 4.3 this week i think sony will release new bugfixing version
Click to expand...
Click to collapse
thanks, I will try it.
Sent from my LG-P760 using xda premium
LilProphet said:
thanks, I will try it.
Sent from my LG-P760 using xda premium
Click to expand...
Click to collapse
nice music btw
ParaSense. said:
nice music btw
Click to expand...
Click to collapse
thank you, I'm glad you like it
Sent from my LG-P760 using xda premium
LilProphet said:
thank you, I'm glad you like it
Sent from my LG-P760 using xda premium
Click to expand...
Click to collapse
u fixed it?
ParaSense. said:
u fixed it?
Click to expand...
Click to collapse
no, he's returned again to the store, but I'm sure they will just reflash that buggy 4.3
Sent from my LG-P760 using xda premium

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