[Q] Downgrade - Xperia SP Q&A, Help & Troubleshooting

Hi guys, i'm Darwin from Honduras, Central America. Im newest with my SP 5302
So i have dowloaded the newest firmware 12.1.A.1.201, and i didn't read that i can't root from 4.3 JB.
I read some thread and i can make a downgrade from my current FW. So the thing is i can't find a FW that's fits my phone (country or region), the question is ¿Can i use othe countrys FW in my phone (UK, India for example)? It will crash? I will be able to use my sim card and navigate without problems?
Thanks in advice, you guys are awesome.
PS. Pardon my bad english.

If you are interested in the latest .201 which is rooted, there are some devs developing nice ROMs based on .201 with root.
At the moment I am on purexperience which incorporates Z2 gui, etc and fast. It still has some bugs but I can live with it until something better comes along, if at all. :laugh: (http://forum.xda-developers.com/showthread.php?t=2691767&page=4)
Otherwise, another dev has put a full .201 in the forum which is rooted (http://forum.xda-developers.com/showthread.php?t=2704312 or http://forum.xda-developers.com/showthread.php?t=2704009)
Note: you will need to be rooted with CWM recovery in order to install these ROMs. The only way that I know is to downgrade the firmware to old 4.1.2 which enables you to use Doomlord's exploit (V18) after which you can install CWM.
http://forum.xda-developers.com/showthread.php?t=2658952
http://forum.xda-developers.com/showthread.php?t=2405933 (for this one you will have to flash .254 full firmware before starting the process)
PS: you don't have to get the ftf that fits your country. Just take CE, SG, AU, UK (if you are comfortable with English) and it will prompt you for your language during setup...After all the downgraded ftf is simply a step to root and will be wiped out when you install .201

you can use stock based ROM, I am curently used existenz 2.1.5, it now also have newer version with xperia sirius features on it.
complete tutorial and downgrading : http://forum.xda-developers.com/showthread.php?p=51624250

headache59 said:
If you are interested in the latest .201 which is rooted, there are some devs developing nice ROMs based on .201 with root.
At the moment I am on purexperience which incorporates Z2 gui, etc and fast. It still has some bugs but I can live with it until something better comes along, if at all. :laugh: (http://forum.xda-developers.com/showthread.php?t=2691767&page=4)
Otherwise, another dev has put a full .201 in the forum which is rooted (http://forum.xda-developers.com/showthread.php?t=2704312 or http://forum.xda-developers.com/showthread.php?t=2704009)
Note: you will need to be rooted with CWM recovery in order to install these ROMs. The only way that I know is to downgrade the firmware to old 4.1.2 which enables you to use Doomlord's exploit (V18) after which you can install CWM.
http://forum.xda-developers.com/showthread.php?t=2658952
http://forum.xda-developers.com/showthread.php?t=2405933 (for this one you will have to flash .254 full firmware before starting the process)
PS: you don't have to get the ftf that fits your country. Just take CE, SG, AU, UK (if you are comfortable with English) and it will prompt you for your language during setup...After all the downgraded ftf is simply a step to root and will be wiped out when you install .201
Click to expand...
Click to collapse
Indohara said:
you can use stock based ROM, I am curently used existenz 2.1.5, it now also have newer version with xperia sirius features on it.
complete tutorial and downgrading : http://forum.xda-developers.com/showthread.php?p=51624250
Click to expand...
Click to collapse
Thanks buddy, i appreciate your info i wanna try it later. Just im still in doubt with my question.
Can i use other country's FW? Im scared if i lose something, like my phone will be unable to conect the bands in my place.

darwinzp said:
Thanks buddy, i appreciate your info i wanna try it later. Just im still in doubt with my question.
Can i use other country's FW? Im scared if i lose something, like my phone will be unable to conect the bands in my place.
Click to expand...
Click to collapse
Yes, You Can

darwinzp said:
Thanks buddy, i appreciate your info i wanna try it later. Just im still in doubt with my question.
Can i use other country's FW? Im scared if i lose something, like my phone will be unable to connect the bands in my place.
Click to expand...
Click to collapse
The radio baseband determines the frequency the phone can receive flashing another region firmware won't affect it if yours is a c5303 I know Brazil is then you will be fine flashing other c5303 fw for example uk. I think its just USA that has a different baseband.
Programming is a race between engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning.

Related

Orange (EE) taking forever to release JB update

Orange seem to be taking years to release the JB update for the Xperia T. I know they have to check it and whatnot, but does it really take that long, since both Google and Sony have already been through the update with a fine toothcomb?
I'm seriously considering rooting my phone as Orange (EE) are just promises and more promises.
Is it worth rooting?
Please advise..
root isnt necesary when you want to flash different region firmware...just backup your firmware http://forum.xda-developers.com/showthread.php?t=1377853 and then flash some JB firmware via flashtool and when you want to go back just flash your created backup:good:
Vodafone is not planning on releasing 4.1 either, at least here in Spain.
Frankly, I don't bother with carrier customized roms any more, as soon as I check the phone is working I start flashing.
Conercao, you should do the same thing that i've done.
Take an official JB .tft files from XT wihout operators (like Orange, which never follow updates), you can find this on the forum, and you've to flash it using flashtool.
There is no bug or no problem with it, because it's the ROM provide by Sony, without all orange stupids apps.
If you want to keep the root, there is some tutos in the android dev sections to keep it (downgrade via flashing an old firmware .303 if I remember and do some particular things to keep the root). I haven't done this, just because i forgot it when i flash the JB tft files.
Maybe i'll do this next week, I don't know ...
Did the same as others here op. Just get the official firmware and flash. First android phone I've had that I've not felt compelled to root.
Also highly recommend you check out Xperia Launcher 1.3.7 in these forums. An excellent modded stock launcher with a heap of extra features.
Sent from my LT30p using xda premium

[Q] Backup my current firmware

Hi guys, i have already searched on Google and here in the forum and found many guides for saving firmwares but not the real solution to my problem so hope you can help me
I am on stock ics 7.0.A.1.303 on my brand new xperia T and would like to update it to jb soon but before to do that I would like to backup my CURRENT running firmware just in case..
All the guides i found requires to update to the latest firmware available with pc companion or the other sw and then generate the ftf firmware starting from the downloaded files.. the problem is that I want to backup my current firmware not the newer one I will download!
Is that possible? Any chance?
Byte and thanks in advance
Either root, install recovery and make a backup or search for a ftf with your currant firmware version in the all in one thread from the question and answer section
Sent from my LT30p using xda premium
Thanks my friend. I did read your all in one guide: that's simply great there i found all the info i will need for rooting, installing cwm and then be able to install custom roms.. I plan to install CM soon
Btw about the ftf's i saw them also, but i see there are many customizations of the same ftf so to avoid problems I wanted to save my own
The problem is that I'm in Italy + i have a no brand phone and I'm not sure if my ftf is in that list.. maybe my current ftf is the General ics central Europe one?
Bye and thanks again
Yes, you can use that one
Sent from my LT30p using xda premium
Thanks! Just last question: if I well understood reading around here, the firmware ftf's don't include the kernel also, so if after updating to jb I would like to go back to ics i should flash the kernel separately right? If so, can i flash "[Kernel] Stock Kernel taken from Xperia T [LT30p] 7.0.A.1.303 [Vodafone UK]" I found in your guide even if it says vodafone uk? I guess so as it is "just" a kernel but just to be sure.. Thanks again!
moly82 said:
Thanks! Just last question: if I well understood reading around here, the firmware ftf's don't include the kernel also, so if after updating to jb I would like to go back to ics i should flash the kernel separately right? If so, can i flash "[Kernel] Stock Kernel taken from Xperia T [LT30p] 7.0.A.1.303 [Vodafone UK]" I found in your guide even if it says vodafone uk? I guess so as it is "just" a kernel but just to be sure.. Thanks again!
Click to expand...
Click to collapse
That will be fine, but the ftf's do include the stock kernel, so don't worry.

Firmware 4.3 for Xperia TL Lt30at?

Hi guys, I in Vietnam and I have a Xperia TL Lt30at, I bought it from a store in my country, now I want to upgrade firmware 4.3 for my phone. But I don't know what firmware for it, as I search, that just has firmware 4.3 for Xperia T/TX. I just wondering my phone can read my sim, can use gsm and 3G in my country, so is that unlocked? If it was unlocked, can I use it as every Xperia T (Lt30p) other and up every firmware as Lt30p?
Sorry for my bad english
Hello. I am also using Xperia TL. I can answer your questions :
1) TL can use any rom of Xperia T, not TX made for looked bootloader.
2) You can test your phone with Vietnamese mobile network. If it doesn't run, you should ask your seller to unlock network for you.
Sent from my LT30at using Tapatalk
ScethN said:
Hello. I am also using Xperia TL. I can answer your questions :
1) TL can use any rom of Xperia T, not TX made for looked bootloader.
2) You can test your phone with Vietnamese mobile network. If it doesn't run, you should ask your seller to unlock network for you.
Sent from my LT30at using Tapatalk
Click to expand...
Click to collapse
It means I can upgrade my TL lt30at to 4.3 firmware for Xperia T lt30p? Are you sure? I worry that my phone will be brick but there one thing I dont understand. This is all firmware 4.3 for lt30p and I dont know what firmware I can flash for my lt30at
2. Xperia T [LT30p]
9.2.A.0.295 - Unbranded *James Bond Skyfall Edition* – Italy (1268-8479)
9.2.A.0.295 - Unbranded *James Bond Skyfall Edition* – Central Europe (1268-3194)
9.2.A.0.295 - Unbranded – Taiwan (1266-6099)
9.2.A.0.295 - Unbranded – Italy (1265-1589)
9.2.A.0.295 - Unbranded – Central Europe (1265-1620)
9.2.A.0.295 - Brand Vodafone – United Kingdom (1265-9139)
9.2.A.0.295 - Brand Vodafone – Germany (1266-0537)
Click to expand...
Click to collapse
Can you help me?
kulomo said:
It means I can upgrade my TL lt30at to 4.3 firmware for Xperia T lt30p? Are you sure? I worry that my phone will be brick but there one thing I dont understand. This is all firmware 4.3 for lt30p and I dont know what firmware I can flash for my lt30at
Can you help me?
Click to expand...
Click to collapse
I sure that, because i have tried it. I'm using Ultimate PureXT v2.1 of DaRk-L0rD and it run properly, except general bug of xperia T
Had you used search before posting, you would have found my guide on upgrading LT30at to 4.3. LT30p and LT30a/t are the same devices. The only difference is that that a devices have LTE radios in them. Since you use only 3G network, you don't need to worry about basebands.
ScethN said:
I sure that, because i have tried it. I'm using Ultimate PureXT v2.1 of DaRk-L0rD and it run properly, except general bug of xperia T
Click to expand...
Click to collapse
I'm mean stock firmware, not rom cook stock firmware flash via flashtool
kulomo said:
I'm mean stock firmware, not rom cook stock firmware flash via flashtool
Click to expand...
Click to collapse
PureXT is based on stock. Sony no longer upgrades software for its at&t devices, so you have to use stock-based custom ROMs if you want to be up to date.
bsined said:
Had you used search before posting, you would have found my guide on upgrading LT30at to 4.3. LT30p and LT30a/t are the same devices. The only difference is that that a devices have LTE radios in them. Since you use only 3G network, you don't need to worry about basebands.
Click to expand...
Click to collapse
So if I just use 3G network, I can flash firmware via flashtool normally? But can you help me to know which firmware can flash from the list in above ?
bsined said:
PureXT is based on stock. Sony no longer upgrades software for its at&t devices, so you have to use stock-based custom ROMs if you want to be up to date.
Click to expand...
Click to collapse
Sorry if I dont understand what you said
So there's no way to upgrade to 4.3 except flash rom cook? I thought it could be debranded ?
kulomo said:
So if I just use 3G network, I can flash firmware via flashtool normally? But can you help me to know which firmware can flash from the list in above ?
Click to expand...
Click to collapse
kulomo said:
Sorry if I dont understand what you said
So there's no way to upgrade to 4.3 except flash rom cook? I thought it could be debranded ?
Click to expand...
Click to collapse
Let me get this right:
- you own LT30at: Xperia TL with USA at&t branding, not Rogers from Canada, which is LT30a
- you live in Viet Nam and you don't have 4G/LTE network where you live
- you want to upgrade the firmware to 4.3 and keep all native Sony features
All you have to do is follow my guide. There is no 4.3 coming for LT30at via Sony Update Service.
"ROM cook" stuff doesn't mess up your device because it's basically the stock ROM with some APKs added/changed. I don't know why you worry about losing at&t branding - it's absolutely useless to you since you aren't in the USA.
Moreover, flashing using the flashtool, you will lose all of your apps, settings, and root access. If you are fine with that, then do go ahead and pick any TFT firmware for T or TL from the list and then flash it.
bsined said:
Let me get this right:
- you own LT30at: Xperia TL with USA at&t branding, not Rogers from Canada, which is LT30a
- you live in Viet Nam and you don't have 4G/LTE network where you live
- you want to upgrade the firmware to 4.3 and keep all native Sony features
All you have to do is follow my guide. There is no 4.3 coming for LT30at via Sony Update Service.
"ROM cook" stuff doesn't mess up your device because it's basically the stock ROM with some APKs added/changed. I don't know why you worry about losing at&t branding - it's absolutely useless to you since you aren't in the USA.
Moreover, flashing using the flashtool, you will lose all of your apps, settings, and root access. If you are fine with that, then do go ahead and pick any TFT firmware for T or TL from the list and then flash it.
Click to expand...
Click to collapse
Thank you so much for your help
Actually, I thought my phone can flash stock firmware of Xperia T so might be debranding will help to flash it without flash rom cook. I dont mean flashing rom cook will lose brand
Thank you so much
kulomo said:
Thank you so much for your help
Actually, I thought my phone can flash stock firmware of Xperia T so might be debranding will help to flash it without flash rom cook. I dont mean flashing rom cook will lose brand
Thank you so much
Click to expand...
Click to collapse
I'm worried a little that you misunderstood something we had said. Please verify everything with Vietnamese resources.
bsined said:
Let me get this right:
- you own LT30at: Xperia TL with USA at&t branding, not Rogers from Canada, which is LT30a
- you live in Viet Nam and you don't have 4G/LTE network where you live
- you want to upgrade the firmware to 4.3 and keep all native Sony features
All you have to do is follow my guide. There is no 4.3 coming for LT30at via Sony Update Service.
"ROM cook" stuff doesn't mess up your device because it's basically the stock ROM with some APKs added/changed. I don't know why you worry about losing at&t branding - it's absolutely useless to you since you aren't in the USA.
Moreover, flashing using the flashtool, you will lose all of your apps, settings, and root access. If you are fine with that, then do go ahead and pick any TFT firmware for T or TL from the list and then flash it.
Click to expand...
Click to collapse
If I don't need to keep apps, settings and LTE, can I follow the instruction in DaRk-L0rD's post?
@kulomo: You can either follow DaRk-L0rD's instructions or just flash an FTF using Flashtool.
bsined said:
@kulomo: You can either follow DaRk-L0rD's instructions or just flash an FTF using Flashtool.
Click to expand...
Click to collapse
Thank you
bsined said:
@kulomo: You can either follow DaRk-L0rD's instructions or just flash an FTF using Flashtool.
Click to expand...
Click to collapse
Can you help me something more? Now I'm starting to root my device which on 4.1.2, and firstably I try to unlock bootloader but unfornatly my rooting status say Bootloader is not allowed to unlock Is there anyway to upgrade to 4.3 without unlock bootloader?
kulomo said:
Can you help me something more? Now I'm starting to root my device which on 4.1.2, and firstably I try to unlock bootloader but unfornatly my rooting status say Bootloader is not allowed to unlock Is there anyway to upgrade to 4.3 without unlock bootloader?
Click to expand...
Click to collapse
Why are you even trying to unlock the boatload? You need to root the phone not unlock the bootloader. Just follow the instructions.

[Q] kitkat or higher firmware xperia z

i bought xperia z C6606 build number 10.4.c.0.814 android version 4.3 with locked bootloader unrooted, all i want to learn from you is how to install latest stock firmware to get the update faster c6606 is a t mobile phone so that they update very slow please help
osama-ali111 said:
i bought xperia z C6606 build number 10.4.c.0.814 android version 4.3 with locked bootloader unrooted, all i want to learn from you is how to install latest stock firmware to get the update faster c6606 is a t mobile phone so that they update very slow please help
Click to expand...
Click to collapse
Search for firmware.. U want in . Ftf format for ur device And flash it via flash tool...
Hope this helps
Firmware
I tried much but failed to find kitkat or higher
You're on the latest available software for your device (C6606). It seems that T-Mo aren't interested in the C6606 any more and won't approve updates for it.
I've seen around the forum that some people have flashed the C6616 firmware to their C6606 with success. You could try that. I'm not sure if you would lose any T-Mo features like wifi calling though and it's obviously at your own risk. Nothing should go wrong though.
If you want to try, you can download and flash the latest C6616 firmware (10.6.A.0.454) by following my guide - How to package and flash stock roms in FTF format
Firmware
Thanks @kingvortex i dnt want any t mobile app at all but the flashing will support official sony updates? And c6606 is compatible with c66016 stock firmware?
osama-ali111 said:
Thanks @kingvortex i dnt want any t mobile app at all but the flashing will support official sony updates? And c6606 is compatible with c66016 stock firmware?
Click to expand...
Click to collapse
Yes, it's compatible and you will receive official updates from Sony.
Thank you
Thank you buddy now i m gonna try this and i.will inform u tonight any tips for safe side??
osama-ali111 said:
Thank you buddy now i m gonna try this and i.will inform u tonight any tips for safe side??
Click to expand...
Click to collapse
Most people have found it better to do a clean flash when upgrading to Lollipop, so it's probably best to backup your apps and reinstall after flashing. Apart from that you shouldn't have problems if you follow my guide.
Clean
I dnt want any data i want a perfect stock rom only thats become possible only because of you thanks i will message u tonight
flash tool
@kingvortex buddy hery is something i didnt get http://forum.xda-developers.com/showthread.php?t=920746
(WARNING : Since Xperia Z, sony added a new set of files I called bootbundle. Those files can be bundled from 0.9.13 and can be flashed from 0.9.13 only. To all those flashing devices from Z edition to all after Z, it is highly advised to use 0.9.13 and to be sure FTF you flash contain the bootbundle set. I've been reported of hard bricks because of missing such set of files from bundles.) copied from there
what is this thing ?? and download link for flash tool there are to many links on that page
Just use the latest version. You can download it from here. I suggest downloading via torrent if you can as it's the fastest way.
downloading
kingvortex i am downloading
Device: Xperia Z (C6616)
CDA: 1285-4276
Market: USA
Operator: Customized US
Network: AMERICAS-LTE
Release: 10.6.A.0.454 / R1E
Size: 1.21 GB
please tell me is it ok for my c6606?
now running 5.0.2 on my c6606
Thanks God
credits : kingvortex for http://forum.xda-developers.com/xperia-z/general/guide-how-to-package-flash-stock-roms-t2914567
DooMLoRD for the Flashtool driver package.
Androxyde for Flashtool.
Iagucool for the XperiFirm firmware downloader used by Flashtool.
osama-ali111 said:
now running 5.0.2 on my c6606
Thanks God
credits : kingvortex for http://forum.xda-developers.com/xperia-z/general/guide-how-to-package-flash-stock-roms-t2914567
DooMLoRD for the Flashtool driver package.
Androxyde for Flashtool.
Iagucool for the XperiFirm firmware downloader used by Flashtool.
Click to expand...
Click to collapse
How did you actually get 5.0.2 installed to your phone after you flashed 6616? Did you use PC companion or do an OTA update?
Thanks ahead of time.
xdiy said:
How did you actually get 5.0.2 installed to your phone after you flashed 6616? Did you use PC companion or do an OTA update?
Thanks ahead of time.
Click to expand...
Click to collapse
The guide I linked to will allow you to download and directly flash 5.0.2 to your phone.
Here it is again: How to package and flash stock roms in FTF format
kingvortex said:
The guide I linked to will allow you to download and directly flash 5.0.2 to your phone.
Here it is again: How to package and flash stock roms in FTF format
Click to expand...
Click to collapse
Oh nice. I don't have to root my phone right? I'm kinda new to this.
xdiy said:
Oh nice. I don't have to root my phone right? I'm kinda new to this.
Click to expand...
Click to collapse
No, you don't need root.
kingvortex said:
No, you don't need root.
Click to expand...
Click to collapse
Thanks a lot dude. Would've been stuck on 4.3 for I dunno how long if it weren't for you.
So since I updated to 5.0.2 a couple days ago I can't seem to use mobile network for internet access. Only wifi works. Any ideas as to why this is happening?
xdiy said:
So since I updated to 5.0.2 a couple days ago I can't seem to use mobile network for internet access. Only wifi works. Any ideas as to why this is happening?
Click to expand...
Click to collapse
Did you try downloading Internet settings? It's under Settings -> Wireless & network -> More -> Internet settings.

Does Xperia™ Companion software find unbranded ROMs?

Hello. Sorry if this is a silly question; first time Xperia user here. Does the Xperia™ Companion software find unbranded ROMs that don't come OTA? I have a UK o2 Z3+ and want the latest official Sony stock debranded ROM. Could you tell me if the Xperia™ Companion software would download this for me or will it only bring up carrier-modified ROMs as if I were to check OTA?
Thanks!
Hi,
Any reason why you want to use the Xperia™ Companion software? From what you describe, it sounds as if you'd be better going with Flashtool/Xperifirm. You can freely choose from the available roms. Google for a guide for creating the FTF and flashing it.
Should work without B.L. unlocking as long as you're not trying to flash a modified kernel, but your phone will need to be carrier unlocked if you want to move from o2.
Cheers!
Learnincurve said:
Hi,
Any reason why you want to use the Xperia™ Companion software? From what you describe, it sounds as if you'd be better going with Flashtool/Xperifirm. You can freely choose from the available roms. Google for a guide for creating the FTF and flashing it.
Should work without B.L. unlocking as long as you're not trying to flash a modified kernel, but your phone will need to be carrier unlocked if you want to move from o2.
Cheers!
Click to expand...
Click to collapse
Hi,
Actually I love stock Rom only because they are very stable as compared to AOSP custom Rom.
But here in our country the STock Rom comes with lots of bloat. Is it possible to create a stock FTF by self with the help of Flashtool which doesnt have the bloats and useless apps so that my system run lagless. I dont want to unlock my Bootloader.
Any help will be higly appreciated.
arokososoo said:
Hi,
Actually I love stock Rom only because they are very stable as compared to AOSP custom Rom.
But here in our country the STock Rom comes with lots of bloat. Is it possible to create a stock FTF by self with the help of Flashtool which doesnt have the bloats and useless apps so that my system run lagless. I dont want to unlock my Bootloader.
Any help will be higly appreciated.
Click to expand...
Click to collapse
there's nothing in FlashTool to allow you to work on the rom. You'd need to deodex the stock rom, work on it to remove what you don't want, then zipalign. there are guides to doing that, or you could watch the discussions here and see what happens. There was talk of someone creating a deodexed image.
Here's a thread regarding deodexing/zipaligning
BR.
deodex needs root
And z3+ BL needs to be unlocked to aquire ROOT. So I think its impossible.

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