Can any one help me to restore my XT907 back to stock JB 4.1.2 from the stock kitkat 4.4.2 update?
My current System version is: 183.46.10.XT907.Veryzon.en.US
Android Version: 4.4.2
Baseband Version: SM_BP_101031.042.32.86P
Kernal Version: 3.4.42-g5170b6b
[email protected] #1
Fri May 2 00:30:06 PDT 2014
Build Number: KDA20.62-10.1
Build Date: Fri May 2 00:20:25 PDT 2014
Please help me.. Thanks in advance...
Wouldn't recommend you try it on a locked bootloader.
Those that are unlocked shouldn't have any issues.
Technically, with a locked bootloader, if Fastboot will allow you to downgrade, then it should be possible.
You'd have to boot into Fastboot, then run the command:
fastboot flash system system.img
Where system.img is the 4.1.2 image file extracted from the fxz file. If it won't let you do this, then downgrade isn't possible. It will likely say failed flash and you'll have to flash something to kick the phone out of fastboot like logo.img.
You could also try RSDLite and try to flash the 4.1.2 fxz, but I doubt that will work because bootloader and such are not downgradeable and it will likely fail.
GnatGoSplat said:
Technically, with a locked bootloader, if Fastboot will allow you to downgrade, then it should be possible.
You'd have to boot into Fastboot, then run the command:
fastboot flash system system.img
Where system.img is the 4.1.2 image file extracted from the fxz file. If it won't let you do this, then downgrade isn't possible. It will likely say failed flash and you'll have to flash something to kick the phone out of fastboot like logo.img.
You could also try RSDLite and try to flash the 4.1.2 fxz, but I doubt that will work because bootloader and such are not downgradeable and it will likely fail.
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Thanks for ur reply..
My bootloader is locked. I want to try downgrade to stock 4.1.2. Can u please send me the link to download stock 4.1.2 img and exact steps to downgrade?
Thnaks so much in advance..
kulsforu said:
Thanks for ur reply..
My bootloader is locked. I want to try downgrade to stock 4.1.2. Can u please send me the link to download stock 4.1.2 img and exact steps to downgrade?
Thnaks so much in advance..
Click to expand...
Click to collapse
You can get them here:
http://sbf.droid-developers.org/phone.php?device=8
You can extract the original system.img from the archive as well as logo.img in case the phone doesn't allow you to flash system.img, you can use logo.img to kick the phone out of Fastboot. You will need to install Motorola ADB drivers on your computer in advance, and also need a fastboot.exe file which I think you can find via Google, but if you have ever rooted your phone in the past, usually that also came with fastboot.
Anyway, get into fastboot mode by turning off the phone, then holding down all 3 buttons. Use vol- to select Fastboot and vol+ to choose it. Phone should boot into fastboot.
Connect to PC and issue command:
fastboot flash system system.img
If it works, the phone should be downgraded. If it says flash failed, then downgrade isn't possible. In that case, if the phone is stuck in fastboot mode and can't be rebooted, issue this command to get out of fastboot.
fastboot flash logo logo.img
That should let it reboot as normal.
I actually doubt it's possible to downgrade, but I haven't tried it myself so I can't say for sure.
GnatGoSplat said:
You can get them here:
http://sbf.droid-developers.org/phone.php?device=8
You can extract the original system.img from the archive as well as logo.img in case the phone doesn't allow you to flash system.img, you can use logo.img to kick the phone out of Fastboot. You will need to install Motorola ADB drivers on your computer in advance, and also need a fastboot.exe file which I think you can find via Google, but if you have ever rooted your phone in the past, usually that also came with fastboot.
Anyway, get into fastboot mode by turning off the phone, then holding down all 3 buttons. Use vol- to select Fastboot and vol+ to choose it. Phone should boot into fastboot.
Connect to PC and issue command:
fastboot flash system system.img
If it works, the phone should be downgraded. If it says flash failed, then downgrade isn't possible. In that case, if the phone is stuck in fastboot mode and can't be rebooted, issue this command to get out of fastboot.
fastboot flash logo logo.img
That should let it reboot as normal.
I actually doubt it's possible to downgrade, but I haven't tried it myself so I can't say for sure.
Click to expand...
Click to collapse
Thank u so much my friend, I need to clear that I m using this phone in India with Reliance CDMA network. If downgrade will succeed then will it in verizon locked condition or it will remain unlocked for global use? Also I need to add that I have never unlocked my bootloader or rooted my phone.
kulsforu said:
Thank u so much my friend, I need to clear that I m using this phone in India with Reliance CDMA network. If downgrade will succeed then will it in verizon locked condition or it will remain unlocked for global use? Also I need to add that I have never unlocked my bootloader or rooted my phone.
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Click to collapse
I think it would stay unlocked since you wouldn't be reflashing the radio.
It is easy enough to re-unlock if that should get reversed, however.
Ah, nevermind. Don't bother to try it. Even if you could succeed, you'd end up with black screen after the logo. The newer bootloaders will not allow Jellybean to boot. There is no way to downgrade. KitKat is a one way road with a locked BL. Sorry!
GnatGoSplat said:
Ah, nevermind. Don't bother to try it. Even if you could succeed, you'd end up with black screen after the logo. The newer bootloaders will not allow Jellybean to boot. There is no way to downgrade. KitKat is a one way road with a locked BL. Sorry!
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Click to collapse
:crying::crying::crying::crying::crying:
Sorry for the bad news. I'm in the same boat now too. Thought I would experiment with ways to preserve root, and long story short, now I'm stuck on an unrooted phone on stock KK with locked BL.
Why do you want to downgrade? If it's to be rooted, sorry, no solution for that. If there is some other issue, maybe there is a solution for that specific issue.
GnatGoSplat said:
Sorry for the bad news. I'm in the same boat now too. Thought I would experiment with ways to preserve root, and long story short, now I'm stuck on an unrooted phone on stock KK with locked BL.
Why do you want to downgrade? If it's to be rooted, sorry, no solution for that. If there is some other issue, maybe there is a solution for that specific issue.
Click to expand...
Click to collapse
The issue is my CDMA data is not working after upgrade to kitkat. I m from India and using Reliance CDMA sim. Before update, everything was working perfect. But now only data(EVDO or 1x) is not working. GSM data(3G & 2G) is working.
Please help if u have any solution for this issue.
GnatGoSplat said:
You can get them here:
http://sbf.droid-developers.org/phone.php?device=8
You can extract the original system.img from the archive as well as logo.img in case the phone doesn't allow you to flash system.img, you can use logo.img to kick the phone out of Fastboot. You will need to install Motorola ADB drivers on your computer in advance, and also need a fastboot.exe file which I think you can find via Google, but if you have ever rooted your phone in the past, usually that also came with fastboot.
Anyway, get into fastboot mode by turning off the phone, then holding down all 3 buttons. Use vol- to select Fastboot and vol+ to choose it. Phone should boot into fastboot.
Connect to PC and issue command:
fastboot flash system system.img
If it works, the phone should be downgraded. If it says flash failed, then downgrade isn't possible. In that case, if the phone is stuck in fastboot mode and can't be rebooted, issue this command to get out of fastboot.
fastboot flash logo logo.img
That should let it reboot as normal.
I actually doubt it's possible to downgrade, but I haven't tried it myself so I can't say for sure.
Click to expand...
Click to collapse
I'm also on official KK with locked bootloader, Can i flash kk modified system.img via this method ?
Prohyper said:
I'm also on official KK with locked bootloader, Can i flash kk modified system.img via this method ?
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Click to collapse
Sorry, with locked BL, you can't flash modified system.img or older system.img. I tried it just to make sure, and the phone wouldn't allow it.
GnatGoSplat said:
Sorry for the bad news. I'm in the same boat now too. Thought I would experiment with ways to preserve root, and long story short, now I'm stuck on an unrooted phone on stock KK with locked BL.
Why do you want to downgrade? If it's to be rooted, sorry, no solution for that. If there is some other issue, maybe there is a solution for that specific issue.
Click to expand...
Click to collapse
The issue is my CDMA data is not working after upgrade to kitkat. I m from India and using Reliance CDMA sim. Before update, everything was working perfect. But now only data(EVDO or 1x) is not working. GSM data(3G & 2G) is working.
Please help if u have any solution for this issue.
kulsforu said:
The issue is my CDMA data is not working after upgrade to kitkat. I m from India and using Reliance CDMA sim. Before update, everything was working perfect. But now only data(EVDO or 1x) is not working. GSM data(3G & 2G) is working.
Please help if u have any solution for this issue.
Click to expand...
Click to collapse
Good news is that major developments happened a month ago. :good:
You can now root AND unlock bootloader on KitKat. I think you can find the info you need in this thread:
http://forum.xda-developers.com/showthread.php?t=2783806
Once you have bootloader unlocked, you can downgrade back to JB. I have tried it and can confirm it works.
Good luck!
GnatGoSplat said:
Good news is that major developments happened a month ago. :good:
You can now root AND unlock bootloader on KitKat. I think you can find the info you need in this thread:
http://forum.xda-developers.com/showthread.php?t=2783806
Once you have bootloader unlocked, you can downgrade back to JB. I have tried it and can confirm it works.
Good luck!
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Click to collapse
Thanks much for update..
I can not getting the method. Actually I m new with these things.
Can you please explain how to use tr.apk?
Thanks in Advance..
kulsforu said:
Thanks much for update..
I can not getting the method. Actually I m new with these things.
Can you please explain how to use tr.apk?
Thanks in Advance..
Click to expand...
Click to collapse
You just run it and let it do its thing. Your phone should be rooted once it has rebooted. You can verify with any rootchecker app.
Then install and run Motopocalypse.apk to unlock your bootloader.
You can the use RSDLite to flash back to JellyBean using the JB fxz file. You will need to edit the xml file in the fxz file, removing the lines with gpt.bin and tz.mbn.
GnatGoSplat said:
You just run it and let it do its thing. Your phone should be rooted once it has rebooted. You can verify with any rootchecker app.
Then install and run Motopocalypse.apk to unlock your bootloader.
You can the use RSDLite to flash back to JellyBean using the JB fxz file. You will need to edit the xml file in the fxz file, removing the lines with gpt.bin and tz.mbn.
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Click to collapse
Thanks.. I m getting you.. But I m not using verizon network. My Razr M is unlocked for both CDMA and GSM carrier. I m using my Razr M in India and both CDMA and GSM are working at present. only DATA in CDMA is not working.
My question is will it be remain unlocked for both CDMA and GSM career in India after flashing back stock JELLY BEAN?
Thanks in Advance..
kulsforu said:
My question is will it be remain unlocked for both CDMA and GSM career in India after flashing back stock JELLY BEAN?
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Click to collapse
I believe so, yes.
GnatGoSplat said:
I believe so, yes.
Click to expand...
Click to collapse
Thanks.
Can you please send link to download JB 4.1.2 fxz file. and step by step instruction to flash the file.?
i'm stuck on 182.46..15.xt907.verizon.en.us with locked bootloader
i have seem xt907 bootloader unlocked and rooted on youtube
can i flash the 183.46.10.xt907.verizon.en.us firmware on my phone and then can i root it and unlock the bootloader via tovelroot method?
if yes, then can anyone provide me the link to the firmware cause droid-developers site is been shutted down and i cannot get any other way of getting the firmware
thanks in advanced
Alas that message could worked. No bro this thing doesnt work
RahilPatel said:
i'm stuck on 182.46..15.xt907.verizon.en.us with locked bootloader
i have seem xt907 bootloader unlocked and rooted on youtube
can i flash the 183.46.10.xt907.verizon.en.us firmware on my phone and then can i root it and unlock the bootloader via tovelroot method?
if yes, then can anyone provide me the link to the firmware cause droid-developers site is been shutted down and i cannot get any other way of getting the firmware
thanks in advanced
Click to expand...
Click to collapse
No - you can not downgrade with a locked bootloader.
> http://forum.xda-developers.com/droid-razr-m/general/guide-faq-how-to-root-boot-unlock-t2869432