Is it possible to revert Razr M from JB back to ICS? - Droid RAZR M Q&A, Help & Troubleshooting

Hi guys,
Since Cyanogenmod needs your phone to have stock firmware prior to 9.18.79 (which is JB) I've found that the Razr M that's available in Australia (XT905) comes preloaded with JB, and thus I'm wondering if there's a way to revert the phone from JB to ICS in order to unlock the bootloader because apparently the bootloader in JB is patched or something, meaning it can't be unlocked.
I found this link http://www.phonearena.com/news/How-...-M-back-to-stock-ICS-from-the-JB-leak_id35580 but since it's for the Verizon version of the phone and I'm in Australia I was wondering if this method would work for the XT905 version of the phone and if so, does anyone have the stock firmware for the phone as well?
Thanks
DrShellgon :fingers-crossed:

Most likely no. With the xt907's, if you do manage to go back you find that you didn't flash the old bootloader. So it's still not hackable. Currently it is possible to unlock the bootloader on xt907's by UPgrading to the new KitKat release, rooting with towelroot and then you can use the old bootloader hack to unlock.
So your question now turns into, "can you RSD a 907 image onto a 905?" I don't know or have a 905 so I'll let you do the searches. I'd guess flashing the radio from a 907 could lead to a brick, but maybe you only flash part. The signing keys might be different so you'll be hosed.
If you can flash the whole thing, you're gold.
If you can flash everything but the radio, and KitKat will boot with the old radio, (even if you won't get a signal) then do that. I bet nobody knows the answer to this yet. KK might not work, or the new bootloader will think the radio image is unsigned and croak. At this point you're probably bricked until the 905's get KK because you can't downgrade the bootloader.
If KK won't boot with the old radio, will the new bootloader accept the signing keys from the old stuff? Probably not, but if it did, you can replace only the bootloader and then unlock.
BTW: stock images for xt905: http://sbf.droid-developers.org/phone.php?device=20
---------- Post added at 01:25 PM ---------- Previous post was at 12:56 PM ----------
Sounds like you're out of luck see http://forum.xda-developers.com/showpost.php?p=52767459&postcount=22

Related

need modded xt905 Aussie NON-HLOS for xt907 kk

i need to unlock lte 1800 band (as available in xt905), so i need modded xt905 Aussie NON-HLOS to flash on my xt907 (cm11 kk bootloader)
can any one please share it... existing dropbox and google drive links are not working...
I wouldn't try this as it will brick the phone. Reason: different Trustzone signatures. There are / were peoples attempting to flash different NON-HLOS modem BIOS for the particular RAZR M (for example, XT907 NON-HLOS onto XT901. The result is pretty obvious: dead as a doornail). I am researching on RAZR M unbricking and I can pretty much tell you mucking around with the BIOS (bootloader) is a big NO-NO.
I guess you can flash the complete XT905 firmware on the XT907. It did work for me and even the modem does work for GSM (no idea about LTE or CDMA though). It's just, that there is still no KitKat available, so a CM jbbl version would be needed.
I suppose you can - just have to have some confirmation so you can be sure you won't brick the phone you spent the hard-earned money on.
lem22 said:
I guess you can flash the complete XT905 firmware on the XT907. It did work for me and even the modem does work for GSM (no idea about LTE or CDMA though). It's just, that there is still no KitKat available, so a CM jbbl version would be needed.
Click to expand...
Click to collapse
thanks alot,
is this the version that i should flash? and since im currently running cm 11 on kitkatbootloader does it support downgrade to this stock?
9.8.2Q_SMUIRD-7_SEMEAUnlk_USAXT90501TLSTRAE1019.0R_SMJBLTEAURETAIL_P008_A014_1FF_fb.xml
I don't know about the version number. I was on the first VZW KitKat (*.10) and flashed the latest available Aussie firmware which still is 98.21.7 (Build 9.8.2Q_SMUIRD-7) dated Jan 9, 2013.
As long as you have an unlocked bootloader, you can downgrade to JB. There are just some lines in the XML that have to be removed (GPT, TZ, and maybe something else if it fails - the usual procedure for downgrading).
Here are the official CM11 builds for JB bootloader, most likely there won't be any for CM12.
Edit: I was wrong about CM12 for JBBL. Obviously there will be builds for this older bootloader too.

[Q] Basic Steps to my new Razr M

Hello xda.
I've read a lot in here already, but I just want to confirm the steps to have a fully BL Unlocked device to have CM12 or any other ROM:
1. I have 99% sure that it will come with JB, therefore, I need to root using the towelroot.
2. Use Motopocalypse to unlock my Bootloader.
3. Update my Razr M to KitKat (without touching the recovery partition), this I may achieve by receiving an OTA, but I'm not sure i'll get here in Brazil, I didn't find any zip of this (Shoud I install KK via RSDLite?). That way, my Razr M will have KK Bootloader, witch will allow me to install CyanogenMod.
Please tell me if it is correct, and I'll also update this post :highfive:
Thank you!
djlucask said:
Hello xda.
I've read a lot in here already, but I just want to confirm the steps to have a fully BL Unlocked device to have CM12 or any other ROM:
1. I have 99% sure that it will come with JB, therefore, I need to root using the towelroot.
2. Use Motopocalypse to unlock my Bootloader.
3. Update my Razr M to KitKat (without touching the recovery partition), this I may achieve by receiving an OTA, but I'm not sure i'll get here in Brazil, I didn't find any zip of this (Shoud I install KK via RSDLite?). That way, my Razr M will have KK Bootloader, witch will allow me to install CyanogenMod.
Please tell me if it is correct, and I'll also update this post :highfive:
Thank you!
Click to expand...
Click to collapse
I don't have all the answers, but in US, the phone came with JB. If you install the OTA, it will lock the bootloader with no current remedy. Maybe it's OK if the bootloader is unlocked before you install the OTA, but I'm not sure.
If you do receive an OTA, chances are that it's of the 18x.46.15 version which will patch the bootloader unlock exploit, requiring you to unlock before that. However, since not all Jelly Bean builds are unlockable, I'd advise updating to 18x.46.10 (mind the last two digits!) via RSD Lite and unlocking from there. Guides are there in the General section.
Sent from Google Nexus 4 @ CM12
[WARNING: XDA Premium 4.0.13+ lacks Signature function - do not update]
Thank you for the replies, I received a OTA, getting the 283.46.10 firmware, and I did almost exactly what I mentioned at the first post (after receiving the OTA, not before).
And now I have unlocked BL and will get CM12, thank you!

OK2, Android 5.0.1--what are my options?

I currently have AT&T stock (I used to have a custom ROM then had to flash to stock ROM to be able to flash to another custom ROM--however, I accidentally flashed a newer version of the AT&T stock ROM which locked my bootloader and I could no longer flash to a custom ROM). I updated my AT&T stock ROM recently and now my back/menu buttons don't work, so I want to see if I can flash to a custom ROM now.
I don't remember the procedure to flash a custom ROM--do I first need to get root in order to unlock the bootloader to be able to flash ROMs (i.e. if I have root then I am guaranteed to be able to unlock bootloader in order to flash ROM)? Is the baseband version the only thing that determines whether I can unlock the bootloader and then be able to flash ROMs?
I currently have OK2 as broadband version and checked one of the stickied threads which said this:
" ROOT
OK2 -- No direct root method. Must Odin OC4 kernel, use Kingroot, then Odin OK2 kernel back."
Does that mean what I have to do is use Odin to get OC4 kernel, then use Kingroot, then Odin OK2 kernel and then I will be able to have root, which means I can then unlock my bootloader and be able to flash to ANY ROM (not just TouchWiz-based ROMs)? Is there anything else I need to consider or is this 100% foolproof? In the future, what should I be careful of in order to prevent getting my bootloader locked again--just that I don't flash a stock (AT&T) ROM that is known to lock back the bootloader?
Thank you all!
There's no way to unlock the bootloader if you have updated your device to the lastest firmware version. The only thing you can do is flash SafeStrap and use Stock Kernel Based ROMs which are compatible with Safestrap.
As regards to the procedure of rooting an OK2 firmware, I'm afraid I won't be able to help you.
Have a happy new year.
mindstormer said:
...however, I accidentally flashed a newer version of the AT&T stock ROM which locked my bootloader ...
Click to expand...
Click to collapse
I was just about to sit down and flash a stock ROM. Can you explain what you mean by this? Did you flash OK2 and it caused you a problem?
smock9 said:
I was just about to sit down and flash a stock ROM. Can you explain what you mean by this? Did you flash OK2 and it caused you a problem?
Click to expand...
Click to collapse
It was a while ago but I used to have I believe an MDL broadband version which meant I could flash any ROM available. I tried a different ROM, didn't like it, then decided to flash back to the stock ROM but accidentally flashed a newer version of it, which meant that my bootloader is now locked. With a locked bootloader, apparently I can only flash to a newer stock ROM (not other ROMs like Cyanogenmod) via Safestrap.
I think if you don't have the MDL broadband version you shouldn't worry about it anyway because it is locked and you will only be limited to flashing stock ROMs.
Slight correction
The previous entry is not entirely correct. Like the OP, I was originally on an unlocked bootloader on my i337. I'd purchased my i337 on the first day and eschewed OTA updates. I wanted to try a touchwiz based ROM, Hyperdrive, and in doing so I recall flashing the stock NB1 firmware. Every firmware beginning with NB1 has a locked bootloader and there has been no progress for more than a year in unlocking the bootloader again. This can limit you to either stock ROMs OR other touchwiz based ROMs like Hyperdrive. I love the Hyperdrive ROM (now on release 21) but its developer has moved on to a newer phone, so it's stuck at Android 4.4.2 and no one has picked up the project in many months. There are several other touchwiz based ROMs for the i337 version of the S4 which I have also tried but I prefer Hyperdrive's myriad customization, even without proper patching. I'll be moving on soon to the Nexus 6P as my daily driver, but would very much like to keep my S4 up to date with a custom ROM. Given the number of people that have been in this same situation, where a newer stock ROM from AT&T locked a previously unlocked bootloader, it's been surprising that the issues have not been overcome on a phone as popular as the Galaxy S4 was and continues to be. I've seen unlocked versions of the S4 selling for just under $400 in the last week of 2015.
Use the desktop version of Kingoroot to root and use Super su and update the binary. Don't forget to hit thanks if this helped.
The bootloader for the at&t s4 was never unlocked. The MDL bootloader had a flaw in it that allowed you to use LOKI which is a lock bypass, not a way to unlock the bootloader.

G900V from 4.4.4 to most current version with root?

Looked thru the other threads, and didnt see anything that pertained directly perhaps someone can point me in the right direction.
Have my stock S5 from verizon, on 4.4.4 NK2 firmware. Looking to update to whatever is the most current stock firmware with root. I'm coming to this from years of rooting Sprint devices, this is my first Verizon and I've been putting it off forever. Been getting the nag screen everyday now for a software update and I figured it was the time to update this and get myself root.
Thanks in advance for any help in where to look. Please forgive me in advance if this is a duplicate, I searched...I really did, but since its all new to me I wanted to ask.
Looks like the process is to flash 4.4.2, root, check if bootloader can be unlocked, and then proceed 2 different ways if it can be dev bootloader unlocked. If it can, unlock bootloader, flash twrp, and then flash whatever rom you want. If you can't unlock the bootloader, folow the guides to upgrade keeping root with safestrap and use roms that are TW for locked bootloaders. Someone correct me if I'm wrong. I just got a 4.4.4 g900v myself in a trade and I'm figuring out how to proceed as well.
Ok, slight difference. You can root & check the bootloader from 4.4.4...
Root here (Using NCG stock kernel...
http://forum.xda-developers.com/ver.../safely-upgrade-root-4-4-4-nha-volte-t2879348
If you're having trouble finding the NI2 kernel like I did it's here...
http://forum.xda-developers.com/showthread.php?t=2784880
Then use the method bootloader unlock from method 3 here...
http://forum.xda-developers.com/ver...t/rd-unlocking-galaxys-s5-bootloader-t3337909
If you can unlock your bootloader (I could), then flash the bootloader of choice from that link above to correspond to the rom you want. I'll be trying out Phoenix with pd4 (installed from above link) from here...
http://forum.xda-developers.com/verizon-galaxy-s5/development/port-phoenix-rom-v12-0-t3400292

HTC M8 The Legend and how to Upgrade!

Hello guys i decide to open this new thread to ask a few question to clear this out for myself since it last before long time i almost forgot everything.
I bought my m8 imideately after the release and till now NO other device grab my attention in design hardware Sound and etc. So after years of use i drop it several times u know... and i start to have problems sometimes losing signal sometimes when making a call its a bad ass people dont hear my sometimes i dont hear them or the call just drops etc also several sratches.
Anyway i decide to get A NEW M8 second hand in fully working condition in perfect shape without any sings of use. becuase i really love this device.
The previous one was HTCdevs unlocked then Rooted then S OFF with firewater and right now is still runing the latest S.Team ROM
The "New One" that i bought is with Stock Software, Firmware S-ON all is super stock.
As far as i read i cannot S OFF it anymore like before i did with my previous M8 with firewater.
What i can do in order to be able to flash a custum Firmware?
I don`t know what is best for the phone... because i did update my old device from day 1st till now with every new release of Android or Firmware.
Like i say the new one is super clean Stock
Can i jump directly to the latest Android 6 Custum ROM i want?
what i shold do 1st?
HTCdev then ROT and S-OFF?
if i change the motherboard of with the old one that is fully unlocked this will grand me all benefits of S OFF?
For example i want to go all the way from Pure Stock Android 5 lets says to latest Custum S.Team ROM
what i should do best?!
Thank you in advance
I'll answer some of these questions
1. Firewater no longer works, you have to use sunshine now to s-off.
2. To get the newest firmware just update to newest version through OTA, make sure you got locked bootloader. After that you can do whatever you want - unlock bootloader, flash roms, s-off, etc.
If you have a few bucks to spend, you can S-Off your device, but in my case, I have this phone 3 years already and still S-On and have flashed numerous custom ROM's already and I'm happy with it. ?
Sent from my m8 using Tapatalk
tsalta said:
Can i jump directly to the latest Android 6 Custum ROM i want?
Click to expand...
Click to collapse
As long as the phone is currently on Marshmallow, then yes just unlock bootloader, flash TWRP 3.1, and flash the desired ROM.
tsalta said:
if i change the motherboard of with the old one that is fully unlocked this will grand me all benefits of S OFF?
Click to expand...
Click to collapse
Unless you are really skilled with that sort of thing, I'd leave it well enough alone. I've seen a lot go wrong with taking the phone apart. So you risk ruining a brand new phone, for no good reason. Spend the money for sunshine, if you need s-off for a specific reason. But you don't even need s-off for flashing ROMs, firmware, or most other mods.
I'm in the same boat. I just bought an carrier unlocked brand new M8 because.....well....I love this phone. I too have had my current M8 since release but now the charging usb port is acting up. I'm very interested in rooting my new M8. I never did my current one.. My new phone is coming with Android 4.2 I think. Should I I OTA it as soon as it comes in or unlock the bootloader etc flash TWRP before and the just flash a custom ROM?
Saleen28 said:
I'll answer some of these questions
1. Firewater no longer works, you have to use sunshine now to s-off.
2. To get the newest firmware just update to newest version through OTA, make sure you got locked bootloader. After that you can do whatever you want - unlock bootloader, flash roms, s-off, etc.
Click to expand...
Click to collapse
I was rooted, unlocked bootloader with s-off. I went back to stock and got all OTAs. So, is locked bootloader necessary?
theandies said:
My new phone is coming with Android 4.2 I think. Should I I OTA it as soon as it comes in or unlock the bootloader etc flash TWRP before and the just flash a custom ROM?
Click to expand...
Click to collapse
You should OTA and update to Marshmallow before unlocking the bootloader.
Especially if it comes with 4.3 (or anything before Lollipop Android 5), the firmware won't be compatible with the current ROMs, and you will be stuck with issues like no boot, no WiFi, etc. Also, the current TWRP versions will not be compatible with older firmwares.
So short story, you must update in order to flash current ROMs.
---------- Post added at 12:21 PM ---------- Previous post was at 12:15 PM ----------
ramsabi said:
I was rooted, unlocked bootloader with s-off. I went back to stock and got all OTAs. So, is locked bootloader necessary?
Click to expand...
Click to collapse
Unlocked bootloader is okay for OTA updates. However, you will need to restore a stock never rooted ROM (unrooted will work - OTA will fail) and stock recovery in order to OTA update.
Rooted ROM will cause OTA to fail. Custom recovery will cause the update to get stuck, as it expects and requires stock recovery.
Return to stock ROM and stock recovery with using this guide: https://forum.xda-developers.com/htc-one-m8/help/tutorial-how-to-stock-stock-twrp-t3086860
And to be clear, there are no updates beyond Marshmallow for this device.
redpoint73 said:
Unlocked bootloader is okay for OTA updates. However, you will need to restore a stock never rooted ROM (unrooted will work - OTA will fail) and stock recovery in order to OTA update.
Rooted ROM will cause OTA to fail. Custom recovery will cause the update to get stuck, as it expects and requires stock recovery.
Return to stock ROM and stock recovery with using this guide: https://forum.xda-developers.com/htc-one-m8/help/tutorial-how-to-stock-stock-twrp-t3086860
And to be clear, there are no updates beyond Marshmallow for this device.
Click to expand...
Click to collapse
I was rooted, with bootloader off, s-off with TWRP. Did not have stock recovery. Found my version of stock RUU here on XDA, thankfully, installed and received all the OTA's. Am now Android 6.0, HTC Sense 6.0 Software Number 6.12.1540.4.
ramsabi said:
I was rooted, with bootloader off, s-off with TWRP. Did not have stock recovery. Found my version of stock RUU here on XDA, thankfully, installed and received all the OTA's. Am now Android 6.0, HTC Sense 6.0 Software Number 6.12.1540.4.
Click to expand...
Click to collapse
Stock recoveries are posted on the guide I linked. But yes, RUU is a valid method as well to return to stock and/or update. On that note, you could have just RUU'ed up to any version, and not done any OTAs. Marshmallow RUU's for US versions (which yours is) is a slight exception, where you have to flash the 6.12.1540.4 firmware using fastboot, then you can run the 6.12.1540.4 RUU.
No need for s-off to flash a custom ROM/kernel. Just unlock via htcdev, flash twrp recovery via adb, be sure the zip of the new rom is on the internal memory/sdcard, flash it, done. I recommend leedroid + clumsy kernel or ice + clumsy(on ice keep in mind that sometimes it freeze on boot htc logo around the first few restarts, hard restart it and it should be fine, if it's not - clean only cache via twrp and it will boot normal from there on).
I received my new phone, installed the AT&T sim but when I try the OTA system update all it does is say "checking". Can I manually update via PC? What update package should I download from htc?
The phone is currently on Android 4.4.4 htc Sense 6.0 Software # 3.28.401.6
theandies said:
I received my new phone, installed the AT&T sim but when I try the OTA system update all it does is say "checking". Can I manually update via PC? What update package should I download from htc?
The phone is currently on Android 4.4.4 htc Sense 6.0 Software # 3.28.401.6
Click to expand...
Click to collapse
Question has been addressed here: https://forum.xda-developers.com/htc-one-m8/help/carrier-unlocked-gsm-m8-t3598115

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