Develop Bugs

[Q] Factory Unlock HTC One M8 Softbrick HELP!

HI,
I just bought an unlock htc m8 no branding any where. I unlocked the bootloader and flash a custom recovery but when I tried to root the phone something went wrong because I'm stuck on the boot screen and it would not go past it. I have been looking every where how to fix it, I don't have a nandroid back up and don't know which one to look for. Is there a way to restore it back to normal? I also tried flashing a custom rom but it gets stuck in the same place.
please help.
thanks.
(bootloader) version: 0.5
(bootloader) version-bootloader: 3.16.0.0000
(bootloader) version-baseband: 0.89.20.0328_3
(bootloader) version-cpld: None
(bootloader) version-microp: None
(bootloader) version-main:
(bootloader) version-misc: PVT SHIP S-ON
(bootloader) serialno:
(bootloader) imei:
(bootloader) imei2: Not Support
(bootloader) meid: 99000429865069
(bootloader) product: m8_wlv
(bootloader) platform: hTCBmsm8974
(bootloader) modelid: 0P6B20000
(bootloader) cidnum: LRA__001
(bootloader) battery-status: good
(bootloader) battery-voltage: 0mV
(bootloader) partition-layout: Generic
(bootloader) security: on
(bootloader) build-mode: SHIP
(bootloader) boot-mode: FASTBOOT
(bootloader) commitno-bootloader: 0a41237a
(bootloader) hbootpreupdate: 11
(bootloader) gencheckpt: 0

fgarcia10 said:
HI,
I just bought an unlock htc m8 no branding any where. I unlocked the bootloader and flash a custom recovery but when I tried to root the phone something went wrong because I'm stuck on the boot screen and it would not go past it. I have been looking every where how to fix it, I don't have a nandroid back up and don't know which one to look for. Is there a way to restore it back to normal? I also tried flashing a custom rom but it gets stuck in the same place.
please help.
thanks.
(bootloader) version: 0.5
(bootloader) version-bootloader: 3.16.0.0000
(bootloader) version-baseband: 0.89.20.0328_3
(bootloader) version-cpld: None
(bootloader) version-microp: None
(bootloader) version-main:
(bootloader) version-misc: PVT SHIP S-ON
(bootloader) serialno:
(bootloader) imei:
(bootloader) imei2: Not Support
(bootloader) meid: 99000429865069
(bootloader) product: m8_wlv
(bootloader) platform: hTCBmsm8974
(bootloader) modelid: 0P6B20000
(bootloader) cidnum: LRA__001
(bootloader) battery-status: good
(bootloader) battery-voltage: 0mV
(bootloader) partition-layout: Generic
(bootloader) security: on
(bootloader) build-mode: SHIP
(bootloader) boot-mode: FASTBOOT
(bootloader) commitno-bootloader: 0a41237a
(bootloader) hbootpreupdate: 11
(bootloader) gencheckpt: 0
Click to expand...
Click to collapse
Have you flashed a custom recovery on the device? If yes, just try to restore a nandroid back from @Mr Hofs thread and your phone will be fine

Problem is, I don't think there is any nandroid backups available for his device LRA__001. First time I've seen that CID mentioned. Going by MID doesn't help much either, I think the Verizon has the same MID. Going by the "product: m8_wlv" it also indicates Verizon. I do see that he's on AT&T on his profile though but...
Being stuck on bootloader screen for 10minutes or more won't be surprising at all if he flashed a 2.xx.xxx.x firmware based custom ROM instead of a 1.xx.xxx.x version. Need to upgrade firmware in order to do that.
You don't happen to recall what version software your device ran?

Hi, I had the 2.7 TWRP recovery but found the 2.8.0.6 works better. I was able to flash PA ROM and it is working now. Plus now is rooted and S-off and super CID.
The phone has no branding and bought from amazon as unlock from factory. But is funny you mention Verizon has similar IDs because when I plug the phone to HTC sync the first splash screen shows Verizon wireless assistant and then go to the normal HTC one.
I tried the latest HD ROM and it was force closing a lot so I think the firmware is 1.... Something. I want to upgrade but don't know which one to get. Maybe I should look on the Verizon forum, thanks for letting me know that.
I spoke with developer support at HTC and they told me they will help restore to stock and escalated the call. I will let you know if they do help.
Thanks for the replies.

fgarcia10 said:
Hi, I had the 2.7 TWRP recovery but found the 2.8.0.6 works better. I was able to flash PA ROM and it is working now. Plus now is rooted and S-off and super CID.
The phone has no branding and bought from amazon as unlock from factory. But is funny you mention Verizon has similar IDs because when I plug the phone to HTC sync the first splash screen shows Verizon wireless assistant and then go to the normal HTC one.
I tried the latest HD ROM and it was force closing a lot so I think the firmware is 1.... Something. I want to upgrade but don't know which one to get. Maybe I should look on the Verizon forum, thanks for letting me know that.
I spoke with developer support at HTC and they told me they will help restore to stock and escalated the call. I will let you know if they do help.
Thanks for the replies.
Click to expand...
Click to collapse
Honestly if its that much of a hassle, you should stick with something safe, Change the MID and CID to a Dev Edition/Europe, to do a full convert and you wont have to worry about the LRA_001. If you do those 2 steps the the OTA will be automatic as follows.
Else just flash a custom recovery, wipe data/cache and so and restore with one of the TWRP backups posted around here and you'll be good to go :good:

Cool I will try that. I did not know that.

fgarcia10 said:
Cool I will try that. I did not know that.
Click to expand...
Click to collapse
Don't forget though, best steps as follow, change MID, CID, restore via TWRP backup. If youre in Europe then change the MID to EUR, but the CID change it to super CID. Youve gotten past the hardest part which is the SOFF so everything is a breeze from there on out.
You won't lose your internal data if you do any of the following steps but dumping them on your SD card would be safe too.
I had an SG manufactured one, and the OTA came out pretty weird, was an unbranded one too. changed it to Dev/Unlocked MID and the super CID, downloaded the B_US002 TWRP dump thats posted here and restored that. Might want to download the OTA too aswell would save massive time after the first 159MB ota.

Awesome. Thanks!

was any one here ever able to get things working?
i am on LRA__001 and got my radio to stop working, no phone signals
contacted HTC dev and they provided me a zip, flashing that didn't help much, still no signals and can't boot into stock recovery.
seems like i've flashed the wrong hboot or something that's causing everything to be flashed on wrong partition addresses.
any help ?

fgarcia10 said:
HI,
I just bought an unlock htc m8 no branding any where. I unlocked the bootloader and flash a custom recovery but when I tried to root the phone something went wrong because I'm stuck on the boot screen and it would not go past it. I have been looking every where how to fix it, I don't have a nandroid back up and don't know which one to look for. Is there a way to restore it back to normal? I also tried flashing a custom rom but it gets stuck in the same place.
please help.
thanks.
(bootloader) version: 0.5
(bootloader) version-bootloader: 3.16.0.0000
(bootloader) version-baseband: 0.89.20.0328_3
(bootloader) version-cpld: None
(bootloader) version-microp: None
(bootloader) version-main:
(bootloader) version-misc: PVT SHIP S-ON
(bootloader) serialno:
(bootloader) imei:
(bootloader) imei2: Not Support
(bootloader) meid: 99000429865069
(bootloader) product: m8_wlv
(bootloader) platform: hTCBmsm8974
(bootloader) modelid: 0P6B20000
(bootloader) cidnum: LRA__001
(bootloader) battery-status: good
(bootloader) battery-voltage: 0mV
(bootloader) partition-layout: Generic
(bootloader) security: on
(bootloader) build-mode: SHIP
(bootloader) boot-mode: FASTBOOT
(bootloader) commitno-bootloader: 0a41237a
(bootloader) hbootpreupdate: 11
(bootloader) gencheckpt: 0
Click to expand...
Click to collapse
hey
were you able to get it working ?
do you still have that phone?
i need some help

genious_t said:
hey
were you able to get it working ?
do you still have that phone?
i need some help
Click to expand...
Click to collapse
This isn't the same issue as the OP. You flashed the wrong firmware which is much more serious. This thread isn't relevant to your issue, in addition to being over a year old (which also most likely won't help your issue).

redpoint73 said:
This isn't the same issue as the OP. You flashed the wrong firmware which is much more serious. This thread isn't relevant to your issue, in addition to being over a year old (which also most likely won't help your issue).
Click to expand...
Click to collapse
I am just trying to trace ppl with the same variant so I can request them to dump couple of partitions for me. and there is no relevant thread for this particular variant, some says it s bluegrass some says its verizon variant, but according to HTCDev its actually rural area variant.

genious_t said:
I am just trying to trace ppl with the same variant so I can request them to dump couple of partitions for me. and there is no relevant thread for this particular variant, some says it s bluegrass some says its verizon variant, but according to HTCDev its actually rural area variant.
Click to expand...
Click to collapse
The LRA version is the LRA version. there's no question there. Its based on Verizon, but its not Verizon.
Sounds like you are trying to make up solutions. What you need is LRA firmware or RUU (RUU may not exist).

redpoint73 said:
The LRA version is the LRA version. there's no question there. Its based on Verizon, but its not Verizon.
Sounds like you are trying to make up solutions. What you need is LRA firmware or RUU (RUU may not exist).
Click to expand...
Click to collapse
i've got complete RUU from HTCDev to flash via hboot, did flash that but lost the IMEI and baseband version under settings > about, however the getvar all is still showing that information. so just trying to figure out what went wrong. either something is missing in what they have provided. or the hboot version is mismatching.
read bout the boot process and got to know that hboot reads IMEI and baseband while booting up and holds into some shared memory variables which later read by kernel.
just trying to figure out things and also looking for somebody who can provide dumps so i can try flashing them.

genious_t said:
i've got complete RUU from HTCDev to flash via hboot, did flash that but lost the IMEI and baseband version under settings > about, however the getvar all is still showing that information. so just trying to figure out what went wrong. either something is missing in what they have provided. or the hboot version is mismatching.
Click to expand...
Click to collapse
You flashed a hacked Verizon RUU. Its not the LRA RUU, and its also not an official RUU.

redpoint73 said:
You flashed a hacked Verizon RUU. Its not the LRA RUU, and its also not an official RUU.
Click to expand...
Click to collapse
No I explained them my case and they asked to couple of days time and then they provided a zip file to flash via hboot. They claimed that they have prepared this file especially for me. I flashed that file. It was 5.0.1 with almost all the images.
One thing that I doubt is that the hboot is not updated since the android-info.txt says hbootpreupdate=12 and my getvar says 11 so just wondering whether it was updated or not.
Also I dumped mmcblk0p3 (board-info) and I can see my IMEI there too.
Just don't know where to nock my head

genious_t said:
hey
were you able to get it working ?
do you still have that phone?
i need some help
Click to expand...
Click to collapse
I did get it to work again, HTC help me to get it back to stock. I still have the phone. They send me the files to restore it.

genious_t said:
No I explained them my case and they asked to couple of days time and then they provided a zip file to flash via hboot. They claimed that they have prepared this file especially for me. I flashed that file. It was 5.0.1 with almost all the images.
One thing that I doubt is that the hboot is not updated since the android-info.txt says hbootpreupdate=12 and my getvar says 11 so just wondering whether it was updated or not.
Also I dumped mmcblk0p3 (board-info) and I can see my IMEI there too.
Just don't know where to nock my head
Click to expand...
Click to collapse
they send me the wrong files a couple of times. But they did get me the right one at the end. it seems you have the same problem I did. I still the hboot file and the system image. The hboot zip should be installed on download mode and the system image should be rename to OP6BIMG.zip and put in the sd card and re-start the phone in bootloader and let the zip install itself. It takes a long time but it worked. I have the files in my google drive I don't mind sharing it.

fgarcia10 said:
they send me the wrong files a couple of times. But they did get me the right one at the end. it seems you have the same problem I did. I still the hboot file and the system image. The hboot zip should be installed on download mode and the system image should be rename to OP6BIMG.zip and put in the sd card and re-start the phone in bootloader and let the zip install itself. It takes a long time but it worked. I have the files in my google drive I don't mind sharing it.
Click to expand...
Click to collapse
In my case they gave up, the guy said it can still be fixed but I don't know what to do.
Would you be able to share the stuff that worked for you ?

genious_t said:
In my case they gave up, the guy said it can still be fixed but I don't know what to do.
Would you be able to share the stuff that worked for you ?
Click to expand...
Click to collapse
https://drive.google.com/file/d/0Bw_sCYzL1RITbGkzRExWTmU1d1U/view?usp=sharing
https://drive.google.com/file/d/0Bw_sCYzL1RITN0ttSVBZZ3VUYkk/view?usp=sharing

[Q] AT&T M8. Worst case scenario, basically. Phone recoverable?

****ed up and didn't read things properly. I was trying to revert my phone to stock with an HTC RUU, that didn't work, and in haste and anger I set S-ON. On a device running CyanogenMod.
The threads I found on the subject weren't entirely helpful, so I'm here now, hoping I don't have to explain to HTC why I'm dumb. My device boots immediately to fastboot:
*** TAMPERED ***
*** RELOCKED ***
*** Security Warning ***
M8_UL_CA PVD SHIP S-ON
HBOOT-3.18.0.0000
RADIO-1.14.21331931.LA02_2G
OpenDSP-v32.2.2-00542-M8974.0213
OS-2.12.1700.1
eMMC-boot 2048MB
Jun 16 2014,18:47:55.0
Here's the output of fastboot getvar all:
(bootloader) version: 0.5
(bootloader) version-bootloader: 3.18.0.0000
(bootloader) version-baseband: 1.14.21331931.LA02_2G
(bootloader) version-cpld: None
(bootloader) version-microp: None
(bootloader) version-main: 2.12.1700.1
(bootloader) version-misc: PVT SHIP S-ON
(bootloader) serialno: FA45P
(bootloader) imei: 35871
(bootloader) imei2: Not Support
(bootloader) meid: 00000000000000
(bootloader) product: m8_ul_ca
(bootloader) platform: hTCBmsm8974
(bootloader) modelid: 0P6B12000
(bootloader) cidnum: CWS__001
(bootloader) battery-status: good
(bootloader) battery-voltage: 0mV
(bootloader) partition-layout: Generic
(bootloader) security: on
(bootloader) build-mode: SHIP
(bootloader) boot-mode: FASTBOOT
(bootloader) commitno-bootloader: 6e0f5a3d
(bootloader) hbootpreupdate: 11
(bootloader) gencheckpt: 0
all: Done!
finished. total time: 0.131s
If anyone has advice, I'd appreciate it. Thanks!

Delete your IMEI and serial number. Those are personal data, which should never be posted on open forums.
Which RUU? Only an AT&T RUU will work unless you modify MID/CID by s-off.
An AT&T RUU should work.

redpoint73 said:
Delete your IMEI and serial number. Those are personal data, which should never be posted on open forums.
Which RUU? Only an AT&T RUU will work unless you modify MID/CID by s-off.
An AT&T RUU should work.
Click to expand...
Click to collapse
Thanks, I'll make sure to edit those out if I post again. A mod did that this time, hooray.
It was an AT&T RUU. At one point, I installed a stock GPE ROM and might have changed my MID, but don't quite remember. I remember that I changed my CID, but changed it back for the AT&T RUU. Judging by this thread, my MID is an "AT&T, unlocked, developer ID", so I guess it'll work.
If it helps, the specific RUU I used was named RUU_M8_UL_K44_SENSE60_ATT_SECURITY_Cingular_US_1.58.502.1_Radio_1.16.21331931.LA11G_20.31A.4145.02L_release_368350_signed_2. I downloaded it from HTC.

BaconSupreme said:
Thanks, I'll make sure to edit those out if I post again. A mod did that this time, hooray.
Click to expand...
Click to collapse
That's because I reported to the mods to delete the personal data.
BaconSupreme said:
It was an AT&T RUU. At one point, I installed a stock GPE ROM and might have changed my MID, but don't quite remember. I remember that I changed my CID, but changed it back for the AT&T RUU. Judging by this thread, my MID is an "AT&T, unlocked, developer ID", so I guess it'll work..
Click to expand...
Click to collapse
Your CID and MID are the correct one for AT&T.
BaconSupreme said:
If it helps, the specific RUU I used was named RUU_M8_UL_K44_SENSE60_ATT_SECURITY_Cingular_US_1.58.502.1_Radio_1.16.21331931.LA11G_20.31A.4145.02L_release_368350_signed_2. I downloaded it from HTC.
Click to expand...
Click to collapse
That RUU will fail, since it corresponds to hboot 3.16; and with s-on you can't run an RUU with a lower number hboot than is installed on the phone (3.18 in your case). Any other RUU except that one should work. You can find the other RUUs on my AT&T specific Index thread:
http://forum.xda-developers.com/showthread.php?t=2751432

Bad news first: the only RUU in that thread (the 4.4.4 one from HTC) that I could have used didn't work and gave me an unknown error (155). The other executable was the one I was already using and all the others require a microSD card, which I don't own.
Good news instead: This was fixed by... unlocking my bootloader again. Once I did that, my phone booted into CWM which was still installed and then booted into Cyanogenmod which was still there due to all the failed RUUs not doing anything. Hooray!
Thanks for the help, redpoint.

BaconSupreme said:
Bad news first: the only RUU in that thread (the 4.4.4 one from HTC) that I could have used didn't work and gave me an unknown error (155). The other executable was the one I was already using and all the others require a microSD card, which I don't own.
Click to expand...
Click to collapse
Actually, you discovered an error in my Index thread, as the "Official" 4.4.3 RUU link should go here:
http://forum.xda-developers.com/att-htc-one-m8/general/htc-one-m8-ruu-m8ul-4-4-3-t2860423
Instead of incorrectly sending you to the "bootable" RUU.
Not sure why the 4.4.4 RUU is giving your error 155 (wrong image).
BaconSupreme said:
Good news instead: This was fixed by... unlocking my bootloader again. Once I did that, my phone booted into CWM which was still installed and then booted into Cyanogenmod which was still there due to all the failed RUUs not doing anything. Hooray!
Click to expand...
Click to collapse
You actually never mentioned what the original issue with CWM was. Did it not boot?
I think relocking the bootloader wipes the phone. So maybe that was all that was needed to get CWM to boot.

redpoint73 said:
Actually, you discovered an error in my Index thread, as the "Official" 4.4.3 RUU link should go here:
http://forum.xda-developers.com/att-htc-one-m8/general/htc-one-m8-ruu-m8ul-4-4-3-t2860423
Instead of incorrectly sending you to the "bootable" RUU.
Not sure why the 4.4.4 RUU is giving your error 155 (wrong image).
You actually never mentioned what the original issue with CWM was. Did it not boot?
I think relocking the bootloader wipes the phone. So maybe that was all that was needed to get CWM to boot.
Click to expand...
Click to collapse
Yeah, I couldn't boot into CWM. Fastboot > HBoot > Recovery... poof, back into Fastboot.

Help returning my M8 to stock.

Hi guys,
Apologies if I'm posting in the wrong place or if this has already been answered. Google suggests this is a common theme, so I hope you'll bear with me, but... I'm a bit of a beginner when it comes to rooting, and it's been some time since I rooted my M8 and I've forgotten most of what I learned.
I'm looking to 'unroot' my M8 and restore it to factory settings, for two reasons. Firstly, because it will allow me to receive OTA updates which are currently not happily installing (I assume this is due to my having rooted the device). Secondly, I want to unroot because my bank (Barclays) offers a mobile banking app which doesn't work on rooted phones... Which is annoying to say the least, but unfortunately I've concluded that the the app will be more useful to me than having my phone rooted.
My phone is a Vodafone HTC One M8 (VODAP001), S-ON and has TWRP installed, which I did just now in my attempts to unroot.
Doing `fastboot getvar all` gives me this:
Code:
[email protected]~$ fastboot getvar all
(bootloader) version: 0.5
(bootloader) version-bootloader: 3.19.0.0000
(bootloader) version-baseband: 1.25.214500021.06G
(bootloader) version-cpld: None
(bootloader) version-microp: None
(bootloader) version-main: 4.19.161.2
(bootloader) version-misc: PVT SHIP S-ON
(bootloader) serialno: XXXXXXXXXXXX
(bootloader) imei: XXXXXXXXXXXXXXX
(bootloader) imei2: Not Support
(bootloader) meid: 00000000000000
(bootloader) product: m8_ul
(bootloader) platform: hTCBmsm8974
(bootloader) modelid: 0P6B10000
(bootloader) cidnum: VODAP001
(bootloader) battery-status: good
(bootloader) battery-voltage: 0mV
(bootloader) partition-layout: Generic
(bootloader) security: on
(bootloader) build-mode: SHIP
(bootloader) boot-mode: FASTBOOT
(bootloader) commitno-bootloader: 3aa067db
(bootloader) hbootpreupdate: 11
(bootloader) gencheckpt: 0
all: Done!
I hope this is useful and I've provided enough information for someone more knowledgeable to be able to help... but if not let me know and I'll do my best to provide what else is needed!
I should add that I'm a Mac user and as such any solutions which require using Windows tools would be less than ideal. However, if it's absolutely necessary I do have access to a Windows 10 machine which I'm sure my dad would be happy for me to use!
Thanks

http://forum.xda-developers.com/htc-one-m8/general/guide-restore-european-htc-one-m8-to-t3072235
http://forum.xda-developers.com/showthread.php?t=1917237
You will find your ruu on google

TempestZ said:
http://forum.xda-developers.com/htc-one-m8/general/guide-restore-european-htc-one-m8-to-t3072235
http://forum.xda-developers.com/showthread.php?t=1917237
You will find your ruu on google
Click to expand...
Click to collapse
That wwe ruu is useless. He is s-on and needs a Vodaphone ruu at least ! Or a stock nandroid backup.
His best chance is going here
http://forum.xda-developers.com/showthread.php?t=3086860
Look for a backup that has the same main version numbers as your output. Restore it and flash back the stock recovery. That's all there is needed. That way ota will install fine.
I'm not sure if there is a vodaphone ruu with that main version number available and even if you find one and it has a LOWER number it's useless as you can't downgrade via ruu due to being S-ON

yea I know that's why I say google it
Here's one
https://www.androidfilehost.com/?fid=95916177934555497

TempestZ said:
yea I know that's why I say google it
Here's one
Click to expand...
Click to collapse
That one won't work, corrupted. See the size is small for a RUU and that already been discussed in other thread.

Thanks for the replies everyone. I'm still struggling to get my head around this, but I'm getting there!
So, am I right in thinking that all I need to proceed is a stock recovery img (which I have already) and a TWRP backup?

mi_k3 said:
Thanks for the replies everyone. I'm still struggling to get my head around this, but I'm getting there!
So, am I right in thinking that all I need to proceed is a stock recovery img (which I have already) and a TWRP backup?
Click to expand...
Click to collapse
Yes .. you need restore non-rooted 4.19.161.2 backup and 4.19.161.2 stock recovery.img. Once done, proceed with OTA to the current latest 4.19.161.3

Thanks @ckpv5. I will have a go now and see where I get to. I have a copy of 4.19.161.2_ckpv5.zip as well as a 4.19.161.2 recovery so I think I should be all set.
Must say, I'm glad you replied to my thread as all my previous attempts had led me to your other posts/threads! But unfortunately lots of the files I was after had been taken down from mega/etc.
I'll post back with updates/questions when I've had another go

Success!
Thanks so much for your help everyone! I managed to get my phone unrooted and now the Barclays app and OTA updates are working as expected
I followed this process by @ckpv5, except I used adb to push the backup to my phone.

Great ... glad that we could help

Dear, sir/madam:
I would like to unroot my HTC One M8 (T-mobile) phone. I would like it back to its factory version without root.
When I press on clean up, it doesn't really uninstall SuperSu and I want it gone. I also have SuperUser and am currently on TWRP. I am running on:
Android Version (Lollipop):
5.0.1
HTC Sense Version:
6.0
(I have no idea if I should put these other info down too but I will do so anyways)
Software number:
4.20.531.4
Kernal Version:
3.4.0-gadd5817
[email protected] #1
SMP PREEMPT
Baseband Version:
1.23.213311491.05G_20.57.4198.2_F
Build Number:
4.20.5314 C464190 Release-Keys
I really want to unroot my phone. I don't have a PC or a laptop so I would really like it if I could do it mobile. Please. I'm dying to do this. If there is any information that is needed PLEASE, tell me where to get it and how to get it and I will find it. I need step-by-step. I... Am... Noob... Please......
Sent from my HTC One_M8 using XDA Free mobile app

w0lfy117 said:
I really want to unroot my phone. I don't have a PC or a laptop so I would really like it if I could do it mobile. Please. I'm dying to do this. If there is any information that is needed PLEASE, tell me where to get it and how to get it and I will find it. I need step-by-step. I... Am... Noob... Please......
Sent from my HTC One_M8 using XDA Free mobile app
Click to expand...
Click to collapse
Not easy to do thing without PC.
You have a T-Mobile device, you should be able to find a backup in T-Mobile section : http://forum.xda-developers.com/showthread.php?t=2714456
If you have PC, then you can RUU it - http://www.htc.com/us/support/rom-downloads.html
Download the latest RUU 4.20.531.5
That's all I can help as I'm not familiar with T-Mobile US device.

Htc M8, confused, want to update to marshamallow

Hello I bought M8 from somebody, it is unbranded European model i think, phone is rooted and carrier unlocked as im using it in asia. it comes with android 5.0.1, I want to update to stock marshmallow for this variant. I have been trying to do on my own but it only confused me more. Im not sure if i have custom rom or if because im rooted, because At the time moment it doesnt offer any software updates from the main menu.
Some info abt phone.
Its model id at back is Op6B100,
Android version 5.0.1
Software number 4.18.708.12
Build number 4.18.708.12
In the bootloader menu I have
Software status: Official
Locked ( i think it means bootloader)
M8_UL PVt SHIp s-off
Cid-11111111 (but if I check with cidgetter it says t-mob010). So it confused me because according to its model its supposed to be european model but in fastboot it says 11111111.
HBoot 3.19.0.0000
I dont have twrp installed.
So please tell me where to go from here. I want to either from here go direct to stock android 6 for this M8 variant or go back to stock condition and get ota update. I prefer to lose the root. So please tell me which stock firmware I need, and do I need to change cid, remove root, before that? Also i would like not to brick my device in process.. Thanks.
Also my device is carrier unlocked at the moment so Im hoping this shouldn't affect that. Thanks

.??

Post fastboot getvar all result (delete serial & imei no. before posting) then someone will be able to help.

(bootloader) version: 0.5
(bootloader) version-bootloader: 3.19.0.0000
(bootloader) version-baseband: 1.24.21331147A1.09G
(bootloader) version-cpld: None
(bootloader) version-microp: None
(bootloader) version-main: 4.18.708.12
(bootloader) version-misc: PVT SHIP S-OFF
(bootloader) imei2: Not Support
(bootloader) meid: 00000000000000
(bootloader) product: m8_ul
(bootloader) platform: hTCBmsm8974
(bootloader) modelid: 0P6B13000 ( on the back its 0P6B100)
(bootloader) cidnum: 11111111
(bootloader) battery-status: good
(bootloader) battery-voltage: 0mV
(bootloader) partition-layout: Generic
(bootloader) security: off
(bootloader) build-mode: SHIP
(bootloader) boot-mode: FASTBOOT
(bootloader) commitno-bootloader: 3aa067db
(bootloader) hbootpreupdate: 11
(bootloader) gencheckpt: 0
all: Done!
I would like to install htc marshmallow update, kindly tell me how I can do that.

First you need to change MID to EU
Then install EU marshmallow RUU
Follow this guide - https://forum.xda-developers.com/showpost.php?p=70575580&postcount=12

Do i need twrp to change MId? And do I need to unlock bootloader before flashing RUU.

Kashi88 said:
Do i need twrp to change MId?
Click to expand...
Click to collapse
Yes as said in the guide unless you're running a rooted ROM.
Kashi88 said:
And do I need to unlock bootloader before flashing RUU.
Click to expand...
Click to collapse
No

ckpv5 said:
Yes as said in the guide unless you're running a rooted ROM.
No
Click to expand...
Click to collapse
ok thanks , I keep getting this error in the adb fastboot when flashing ruu zip . target reported max download size ( shows some big number bytes) .

Read the guide again .. you need htc_fastboot not normal fastboot.
At the end of the guide it shows 2 other methods on how to install RUU zip. Pick one thar you think it is easier for you.

ckpv5 said:
Read the guide again .. you need htc_fastboot not normal fastboot.
At the end of the guide it shows 2 other methods on how to install RUU zip. Pick one thar you think it is easier for you.
Click to expand...
Click to collapse
thank you so much i installed it with the micro sd method, and everything worked out smooth. just one last question, if in future i have to reset my phone from settings menu or from bootloader menu (volume down key), will I go back to android lollypop version or remain on this 6.0. thanks again

remain on this 6.0

ckpv5 said:
remain on this 6.0
Click to expand...
Click to collapse
hi..i am suffering from black bootloader issue..cant see any option..is there any solution?

dr.estiack said:
hi..i am suffering from black bootloader issue..cant see any option..is there any solution?
Click to expand...
Click to collapse
Please don't post the same question to multiple threads. It clutters up the forum, and makes it confusing for those trying to help you. Your post is also not related to the topic of this particular thread.

Hi guys anybody can help me ? My Htc one m8 has been bricked i can't flash stock ruu

Hi guys anybody can help me ? My Htc one m8 has been bricked i can't flash stock ruu please help me
this are my fastboot getvar all value :
(bootloader) version: 0.5
(bootloader) version-bootloader: 3.19.0.0000
(bootloader) version-baseband: 1.29.214500021.24_2G
(bootloader) version-cpld: None
(bootloader) version-microp: None
(bootloader) version-main: 6.20.709.2
(bootloader) version-misc: PVT SHIP S-ON
(bootloader) serialno: *****
(bootloader) imei: ******
(bootloader) imei2: Not Support
(bootloader) meid: 00000000000000
(bootloader) product: m8_ul
(bootloader) platform: hTCBmsm8974
(bootloader) modelid: 0P6B11000
(bootloader) cidnum: HTC__621
(bootloader) battery-status: good
(bootloader) battery-voltage: 0mV
(bootloader) partition-layout: Generic
(bootloader) security: on
(bootloader) build-mode: SHIP
(bootloader) boot-mode: FASTBOOT
(bootloader) commitno-bootloader: 205bdca3
(bootloader) hbootpreupdate: 11
(bootloader) gencheckpt: 0
all: Done!
finished. total time: 0.008s
so my bootlader is locked with security warning and software status : modified

Which RUU did your try (version number, file name)? And what does that mean you "can't flash stock ruu"? Did you get any error messages, what point did it fail, etc.?
You also need to tell us how it is "bricked"? Were you trying to flash something, or update, etc.? Or just happened on its own (failed to boot to OS)?
Did you do any mods to the phone, or is it (as far as you know) stock? For that matter, did you get the phone used?

redpoint73 said:
Which RUU did your try (version number, file name)? And what does that mean you "can't flash stock ruu"? Did you get any error messages, what point did it fail, etc.?
You also need to tell us how it is "bricked"? Were you trying to flash something, or update, etc.? Or just happened on its own (failed to boot to OS)?
Did you do any mods to the phone, or is it (as far as you know) stock? For that matter, did you get the phone used?
Click to expand...
Click to collapse
When i flash RUU faced with "remote : 12 signautre verify fail" and this is a RUU that i flashed : HTC One M8 6.20.709.2 sense 8

redpoint73 said:
Which RUU did your try (version number, file name)? And what does that mean you "can't flash stock ruu"? Did you get any error messages, what point did it fail, etc.?
You also need to tell us how it is "bricked"? Were you trying to flash something, or update, etc.? Or just happened on its own (failed to boot to OS)?
Did you do any mods to the phone, or is it (as far as you know) stock? For that matter, did you get the phone used?
Click to expand...
Click to collapse
when i unplugged the phone from charger this problem occurred i didn't flash any RUU later and my phone is unrooted .

mamali0067 said:
when i unplugged the phone from charger this problem occurred .
Click to expand...
Click to collapse
I assume when you say "bricked" it means you can't boot to Android OS, but you can get to bootloader (otherwise, you wouldn't have been able to do fastboot getvar).
On the bootloader screen, does it say LOCKED or UNLOCKED near the top?
Also, I recommend you delete IMEI and serial number from your top post. These are personal info, and should not be posted online (and also, not needed to help or advise you).
---------- Post added at 09:09 AM ---------- Previous post was at 09:09 AM ----------
mamali0067 said:
When i flash RUU faced with "remote : 12 signautre verify fail" and this is a RUU that i flashed : HTC One M8 6.20.709.2 sense 8
Click to expand...
Click to collapse
To confirm, the file actually says "RUU" in the file name, and about 1.5 GB in size?

redpoint73 said:
I assume when you say "bricked" it means you can't boot to Android OS, but you can get to bootloader (otherwise, you wouldn't have been able to do fastboot getvar).
On the bootloader screen, does it say LOCKED or UNLOCKED near the top?
Also, I recommend you delete IMEI and serial number from your top post. These are personal info, and should not be posted online (and also, not needed to help or advise you).
---------- Post added at 09:09 AM ---------- Previous post was at 09:09 AM ----------
To confirm, the file actually says "RUU" in the file name, and about 1.5 GB in size?
Click to expand...
Click to collapse
yes of course it's about 1.6 GB and in my bootloader it say LOCKED

mamali0067 said:
yes of course it's about 1.6 GB and in my bootloader it say LOCKED
Click to expand...
Click to collapse
Is this a zip format RUU? If so, cut/paste the exact commands you used.

redpoint73 said:
Is this a zip format RUU? If so, cut/paste the exact commands you used.
Click to expand...
Click to collapse
yes the RUU is a zip file , but i flashed that RUU perefer in finding right RUU thread and faced with remote : 12 signature verify fail

mamali0067 said:
i flashed that RUU perefer in finding right RUU thread
Click to expand...
Click to collapse
I'm not going to jump around threads looking for the info. I already told you that twice. You should be trying to make it easier for folks to help you, not harder!

redpoint73 said:
I'm not going to jump around threads looking for the info. I already told you that twice. You should be trying to make it easier for folks to help you, not harder!
Click to expand...
Click to collapse
Okay dude , so help me here !

mamali0067 said:
Okay dude , so help me here !
Click to expand...
Click to collapse
You didn't provide the info I asked for: cut/paste the exact commands you used

redpoint73 said:
You didn't provide the info I asked for: cut/paste the exact commands you used
Click to expand...
Click to collapse
Yes , I have been cutted and pasted the command