Develop Bugs

Tried to downgrade to stock - stuck

Hey XDA,
I have a bit of a problem! I was trying to S-OFF my Tmobile m8 phone (ViperOne 2.5.0) so that I could upgrade to the latest and greatest. I installed Sunshine and was told my ROM wasn't compatible.
I followed the instructions here: http://www.android.gs/downgrade-t-mobile-htc-one-m8-to-official-stock-firmware-with-ruu/ to get back to stock so I could S-OFF.
Basically, relock the bootloader (done, successfully - shows Relocked) and ran the RUU utility. The RUU utility says that it's not the right version - I downloaded RUU_M8_TMOUS_1.57.531.7.exe. Now, my phone is stuck in fastboot/hboot and when I try to reboot, goes right back into fastboot. I have no idea what to do from here. I can't get into recovery to restore an image. I can't "fastboot oem unlock" to see if that helps - it fails.
Any ideas?

spinez said:
Hey XDA,
I have a bit of a problem! I was trying to S-OFF my Tmobile m8 phone (ViperOne 2.5.0) so that I could upgrade to the latest and greatest. I installed Sunshine and was told my ROM wasn't compatible.
I followed the instructions here: http://www.android.gs/downgrade-t-mobile-htc-one-m8-to-official-stock-firmware-with-ruu/ to get back to stock so I could S-OFF.
Basically, relock the bootloader (done, successfully - shows Relocked) and ran the RUU utility. The RUU utility says that it's not the right version - I downloaded RUU_M8_TMOUS_1.57.531.7.exe. Now, my phone is stuck in fastboot/hboot and when I try to reboot, goes right back into fastboot. I have no idea what to do from here. I can't get into recovery to restore an image. I can't "fastboot oem unlock" to see if that helps - it fails.
Any ideas?
Click to expand...
Click to collapse
Your issue is that you are trying to run an RUU for an older version (4.4.2), or that you are not on T-Mo US, but on an International/European version.
If you are in the US, run this RUU instead. It will jump you up to Lollipop 5.0, and should also fix your issue.
The above link is to HTC's US website, and is the official 4.20.531.4 RUU. You will want to scroll down to the manual system update instructions. The download is at the bottom of the page.
Good luck!

xunholyx said:
Your issue is that you are trying to run an RUU for an older version (4.4.2), or that you are not on T-Mo US, but on an International/European version.
If you are in the US, run this RUU instead. It will jump you up to Lollipop 5.0, and should also fix your issue.
The above link is to HTC's US website, and is the official 4.20.531.4 RUU. You will want to scroll down to the manual system update instructions. The download is at the bottom of the page.
Good luck!
Click to expand...
Click to collapse
Thanks for the info, definitely a TMO US phone. I'm downloading now (30 mins remaining). Here's more info if this doesn't work out.
C:\Windows\system32>fastboot getvar all
(bootloader) version: 0.5
(bootloader) version-bootloader: 3.18.0.0000
(bootloader) version-baseband: 1.19.213311491.03G
(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: 00000000000000
(bootloader) product: m8_ul
(bootloader) platform: hTCBmsm8974
(bootloader) modelid: 0P6B13000
(bootloader) cidnum: T-MOB010
(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: 5e4b24e4
(bootloader) hbootpreupdate: 11
(bootloader) gencheckpt: 0
all: Done!
finished. total time: 0.047s

spinez said:
Thanks for the info, definitely a TMO US phone. I'm downloading now (30 mins remaining). Here's more info if this doesn't work out.
C:\Windows\system32>fastboot getvar all
(bootloader) version: 0.5
(bootloader) version-bootloader: 3.18.0.0000
(bootloader) version-baseband: 1.19.213311491.03G
(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: 00000000000000
(bootloader) product: m8_ul
(bootloader) platform: hTCBmsm8974
(bootloader) modelid: 0P6B13000
(bootloader) cidnum: T-MOB010
(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: 5e4b24e4
(bootloader) hbootpreupdate: 11
(bootloader) gencheckpt: 0
all: Done!
finished. total time: 0.047s
Click to expand...
Click to collapse
Yep. That was the problem. I can tell from your bootloader version that you are on 4.4.3 firmware. You can only downgrade if you are s-off.
If you want to get S-Off, after running the RUU would be a good time to do it. It works best when on the stock ROM, but will also work with a near stock ROM such as MaximusHD.
---------- Post added at 03:32 PM ---------- Previous post was at 03:30 PM ----------
Also, delete your serial# and IMEI from your readout. That is private information, and you should never post those on a public forum for your own security.

Tried to install VemonOne and now have a messed up phone with no OS

Ok, i tried to install VenonOne, it installed first time but my wifi didnt work, so i searched around and found out i needed to update my firmware, which needed S-off, which i cant becuase i dont have the money for sunshine. and problem after problem and following half arsed tutoials online solved nothing. i can only go to bootloader and recovery. not sure what to do,
i have twrp installed
Im a D*ck head and didnt make a backup becuae it 'looked easy enough'
any help would be great. would like to be using venomone but atm any os will do
Every rom i install cause the wifi to not work, i press to turn it on and nothing
Thanks guys

michaelcarrot1 said:
Im a D*ck head and didnt make a backup becuae it 'looked easy enough'
Click to expand...
Click to collapse
You probably realize it at this point; but my rule of thumb is always make a backup before flashing anything (or at a minimum, have a known good backup or known good ROM ready to flash). Its got nothing to do with how "easy" a process is. Things can go wrong even with the simplest mods, to the most knowledgeable users, and even if you do nothing wrong.
You don't need s-off to update your firmware.
Either run a Lollipop (or Marshmallow) RUU intended for your CID (relock bootloader in order to RUU). Keeping in mind that this will wipe the phone.
Alternately (such as if there is no RUU for your version), restore a stock ROM that corresponds to your current firmware, restore corresponding stock recovery. Then do OTA update, which will also update your firmware.
After updating the firmware by either of the 2 above methods, just flash TWRP back onto the phone (in case of the RUU method, you'll need to unlock the bootloader again, before you can flash TWRP) and flash your custom ROM of choice.
If you do fastboot getvar all, and post the results (delete IMEI and serial numbers) we can offer some more specific assistance.

thanks for taking your time to help,
< waiting for device >
(bootloader) version: 0.5
(bootloader) version-bootloader: 3.18.0.0000
(bootloader) version-baseband: 1.19.21331147A1.09G
(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: 00000000000000
(bootloader) product: m8_ul
(bootloader) platform: hTCBmsm8974
(bootloader) modelid: 0P6B10000
(bootloader) cidnum: O2___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: 5e4b24e4
(bootloader) hbootpreupdate: 11
(bootloader) gencheckpt: 0
all: Done!
finished. total time: 0.009s
I'm on O2 Uk and all the RUU are named Verizon and other american networks. which RUU do i use
Sorry for all the silly questions

michaelcarrot1 said:
thanks for taking your time to help,
< waiting for device >
(bootloader) version: 0.5
(bootloader) version-bootloader: 3.18.0.0000
(bootloader) version-baseband: 1.19.21331147A1.09G
(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: 00000000000000
(bootloader) product: m8_ul
(bootloader) platform: hTCBmsm8974
(bootloader) modelid: 0P6B10000
(bootloader) cidnum: O2___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: 5e4b24e4
(bootloader) hbootpreupdate: 11
(bootloader) gencheckpt: 0
all: Done!
finished. total time: 0.009s
I'm on O2 Uk and all the RUU are named Verizon and other american networks. which RUU do i use
Sorry for all the silly questions
Click to expand...
Click to collapse
Use this ruu just relock bootloader it's ruu exe it's simple to use and let me know
https://www.androidfilehost.com/?fid=95916177934555499

Flash RUU - signature checking... FAILED (remote: 12 signature failed)

Hello,
I tried to flash a RUU on my m8 but i am not successful currently.
I bought an m8 in china, last year. My sister tried an ota update, the phone lock on bot. So i tried to flash many rom but no success, every flash failed on the last step, the " verification signature checking... " with " FAILED (remote: 12 signature verify fail) ".
I unlock my bootloader but i'am s-on.
I give you my phone detail :
HTML:
> fastboot getvar all
(bootloader) version: 0.5
(bootloader) version-bootloader: 3.19.0.0000
-> (bootloader) version-baseband: 1.29.214500021.12G
(bootloader) version-cpld: None
(bootloader) version-microp: None
(bootloader) version-main: 6.12.401.4
(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: 0P6B10000
-> (bootloader) cidnum: 11111111
(bootloader) battery-status: good
(bootloader) battery-voltage: 0mV
(bootloader) partition-layout: Generic
(bootloader) security: on
(bootloader) build-mode: SHIP
(bootloader) boot-mode: RUU
(bootloader) commitno-bootloader: 76df2b54
(bootloader) hbootpreupdate: 11
(bootloader) gencheckpt: 0
all: Done!
finished. total time: 0.008s
All my try have been in RUU mode (fastboot oem rebootRUU)
Can you provide me a link to a rom that can been flash on my device ?
EDIT: I bought it in china but my cidnum is "11111111" (international), someone can give me an hint of why ?
Thank a lot in advance.

Arhenion said:
Hello,
I tried to flash a RUU on my m8 but i am not successful currently.
I bought an m8 in china, last year. My sister tried an ota update, the phone lock on bot. So i tried to flash many rom but no success, every flash failed on the last step, the " verification signature checking... " with " FAILED (remote: 12 signature verify fail) ".
I unlock my bootloader but i'am s-on.
I give you my phone detail :
HTML:
> fastboot getvar all
(bootloader) version: 0.5
(bootloader) version-bootloader: 3.19.0.0000
-> (bootloader) version-baseband: 1.29.214500021.12G
(bootloader) version-cpld: None
(bootloader) version-microp: None
(bootloader) version-main: 6.12.401.4
(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: 0P6B10000
-> (bootloader) cidnum: 11111111
(bootloader) battery-status: good
(bootloader) battery-voltage: 0mV
(bootloader) partition-layout: Generic
(bootloader) security: on
(bootloader) build-mode: SHIP
(bootloader) boot-mode: RUU
(bootloader) commitno-bootloader: 76df2b54
(bootloader) hbootpreupdate: 11
(bootloader) gencheckpt: 0
all: Done!
finished. total time: 0.008s
All my try have been in RUU mode (fastboot oem rebootRUU)
Can you provide me a link to a rom that can been flash on my device ?
Thank a lot in advance.
Click to expand...
Click to collapse
Since you're S-ON, you will not be able to flash RUUs or firmware below your current ROM version. You can however restore twrp backups of Lollipop ROMs which work fine with your current 6.12 Marshmallow firmware. Otherwise, you can use twrp to flash any custom ROM based on marshmallow & lollipop.
Here's a link to stock marshmallow RUU (6.12.401.4) in zip format, which you should flash from bootloader.
https://www.androidfilehost.com/?fid=24369303960687057
Cheers

I flash the twrp's recovery. I can access to it but when I try to go to install the zip file, twrp refuse to install it with "Zip file is corrupt". I double check md5 sum and they seems to be correct =( .
I also try to flash it with fastboot, just in case, and no result but with a different error: "(bootloader) zip header checking... FAILED (remote: 32 header error) "

Arhenion said:
I flash the twrp's recovery. I can access to it but when I try to go to install the zip file, twrp refuse to install it with "Zip file is corrupt". I double check md5 sum and they seems to be correct =( .
Click to expand...
Click to collapse
You don't flash RUUs with TWRP, you flash them with fastboot in RUU mode. Which you seemed to know based on your top post, so I'm not sure why you tried to flash with TWRP this time.
Arhenion said:
I also try to flash it with fastboot, just in case, and no result but with a different error: "(bootloader) zip header checking... FAILED (remote: 32 header error) "
Click to expand...
Click to collapse
You need to relock your bootloader to RUU with s-on.
Command: fastboot oem lock

Arhenion said:
I flash the twrp's recovery. I can access to it but when I try to go to install the zip file, twrp refuse to install it with "Zip file is corrupt". I double check md5 sum and they seems to be correct =( .
I also try to flash it with fastboot, just in case, and no result but with a different error: "(bootloader) zip header checking... FAILED (remote: 32 header error) "
Click to expand...
Click to collapse
I'm not sure which way you want to go, but:
1. To flash the RUU zip file:
A. You need to put it at the root of your SD CARD and rename it to 0P6BIMG.zip
B. Turn your phone off, then start it into bootloader.
C. Follow the instructions in RED to flash. You will lose all data as the RUU will format all partitions.
2. To install a custom ROM or restore a twrp-specific backup, use TWRP's install function, or restore function respectively.
Cheers

I have the same problem can not flash a RUU ....

Technoolli said:
I have the same problem can not flash a RUU ....
Click to expand...
Click to collapse
Post the results of fastboot getvar all. Edit out your serial# and IMEI (and MEID if you have one) before you post it.

xunholyx said:
Post the results of fastboot getvar all. Edit out your serial# and IMEI (and MEID if you have one) before you post it.
Click to expand...
Click to collapse
fastboot getvar all
(bootloader) version: 0.5
(bootloader) version-bootloader: 3.19.0.0000
(bootloader) version-baseband: 1.29.214500021.12G
(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: 00000000000000
(bootloader) product: m8_ul
(bootloader) platform: hTCBmsm8974
(bootloader) modelid: 0P6B10000
(bootloader) cidnum: T-MOB101
(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: 76df2b54
(bootloader) hbootpreupdate: 11
(bootloader) gencheckpt: 0
all: Done!
finished. total time: 0.432s

Technoolli said:
fastboot getvar all
(bootloader) version: 0.5
(bootloader) version-bootloader: 3.19.0.0000
(bootloader) version-baseband: 1.29.214500021.12G
(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: 00000000000000
(bootloader) product: m8_ul
(bootloader) platform: hTCBmsm8974
(bootloader) modelid: 0P6B10000
(bootloader) cidnum: T-MOB101
(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: 76df2b54
(bootloader) hbootpreupdate: 11
(bootloader) gencheckpt: 0
all: Done!
finished. total time: 0.432s
Click to expand...
Click to collapse
I'm not sure what RUUs you have tried to flash, but this is the last RUU version for your model (T-Mo Germany)
You can flash it with fastboot commands in RUU mode, or you can flash it via the SD card method.
The SD card method is easiest. Rename the .zip by deleting everything in the name of it except for 0P6BIMG (and .zip of course), put it onto your extSD, and boot to bootloader. The rest is pretty much automatic.
Note that since you are S-On, you will have to relock your bootloader first with either method. The command for that is fastboot oem lock
Good luck!

Very helpful thread. Wanted to ask for help here, but already solved the issue

M8 stuck whilst loading recovery mode..

So i accidentally wiped the phone including the internal storage and the OS instead of factory resetting (wasn't paying attention) and tried to re install the android marshmallow OS onto the phone which didn't work..
i managed to flash the twrp by following another forum where someone had the same problem, using the adb process to flash the bootloader etc but now i can't access the recovery at all, it just says entering recovery and remains idle until i get bored of waiting and power off.
Can anyone help me?
i can provide whatever information is necessary for you to help, just need my phone revitalised as i desperately need it for my new job that i should hopefully be starting at the end of the week.
thanks in advance!

@mcg0v
post getvar all after removing serialno and imei
this info will help to know which RUU you need to flash and return your device to stock
any info you can provide is helpful

C:\Users\mcg0v\Desktop\Android\sdk-tools\sdk-tools>getvar all
'getvar' is not recognized as an internal or external command,
operable program or batch file.
C:\Users\mcg0v\Desktop\Android\sdk-tools\sdk-tools>fastboot getvar all
< waiting for any device >
(bootloader) version: 0.5
(bootloader) version-bootloader: 1.55.0000
(bootloader) version-baseband: 4A.21.3263.04
(bootloader) version-cpld: None
(bootloader) version-microp: None
(bootloader) version-main:
(bootloader) version-misc: PVT SHIP S-ON
(bootloader) serialno:
(bootloader) imei:
(bootloader) meid: 00000000000000
(bootloader) product: m7_ul
(bootloader) platform: HBOOT-8064
(bootloader) modelid: PN0710000
(bootloader) cidnum: HTC__001
(bootloader) battery-status: good
(bootloader) battery-voltage: 4266mV
(bootloader) partition-layout: Generic
(bootloader) security: on
(bootloader) build-mode: SHIP
(bootloader) boot-mode: FASTBOOT
(bootloader) commitno-bootloader: dirty-bb768ae1
(bootloader) hbootpreupdate: 11
(bootloader) gencheckpt: 0
all: Done!
finished. total time: 0.318s
Hope this helps, I'm really not that good with anything Android related as of yet, but i really need this phone fixed asap.

@mcg0v
you post your issue in the wrong forum
your device is HTC One m7
this forum is for HTC One m8
go to this thread http://forum.xda-developers.com/htc-one/general/lollipop-ruu-zip-small-collection-t3053944
this is for your device ask there some one will guide you

I have quite the same problem (and i have One M8). Can't enter TWRP recovery, bootloop - just shows an endless loading, i can start the phone without that by pushing pwr button/VOL+/VOL- at the same time (fastboot mode - ok). I want to get the stock back, but it's impossible without entering TWRP. Can someone help me please? It seems that i do not understand this thing anymore.
fastboot getvar all
(bootloader) version: 0.5
(bootloader) version-bootloader: 3.16.0.0000
(bootloader) version-baseband: 1.15.2133156.UA13G
(bootloader) version-cpld: None
(bootloader) version-microp: None
(bootloader) version-main:
(bootloader) version-misc: PVT SHIP S-ON
(bootloader) serialno: removed
(bootloader) imei: removed
(bootloader) imei2: Not Support
(bootloader) meid: 00000000000000
(bootloader) product: m8_ul
(bootloader) platform: hTCBmsm8974
(bootloader) modelid: 0P6B10000
(bootloader) cidnum: VODAP102
(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: ab0efa49
(bootloader) hbootpreupdate: 11
(bootloader) gencheckpt: 0
all: Done!
finished. total time: 0.049s

andreech95 said:
I have quite the same problem (and i have One M8). Can't enter TWRP recovery, bootloop - just shows an endless loading, i can start the phone without that by pushing pwr button/VOL+/VOL- at the same time (fastboot mode - ok). I want to get the stock back, but it's impossible without entering TWRP. Can someone help me please? It seems that i do not understand this thing anymore.
Click to expand...
Click to collapse
Fastboot erase cache, then flash TWRP again in fastboot. Try TWRP 2.8.1.0, which is an older version (more compatible with your old firmware). Then see if you can boot into recovery.
Or flash signed firmware, to update firmware (yours is ancient) then flash TWRP 2.8.7 and restore a newer stock backup (corresponding to the firmware flashed).

redpoint73 said:
Fastboot erase cache, then flash TWRP again in fastboot. Try TWRP 2.8.1.0, which is an older version (more compatible with your old firmware). Then see if you can boot into recovery.
Or flash signed firmware, to update firmware (yours is ancient) then flash TWRP 2.8.7 and restore a newer stock backup (corresponding to the firmware flashed).
Click to expand...
Click to collapse
Thanks a lot. I've tried the first solution and at least TWRP is now working. I've tried the same thing, but it seems, that it was a wrong version of TWRP

Many apologies, turns out i misread the model and its actually the M7 i have. But im glad that this post is helping others with my original problem and thanks to other members who contributed to helping!
-mcg0v

Which RUU Can I Download?

i Have a HTC m8 and no OTA (is 4.4.4 ver) so i want to upgrade but idk which ruu, so fastboot drop this
C:\Program Files (x86)\Minimal ADB and Fastboot>fastboot getvar all
(bootloader) version: 0.5
(bootloader) version-bootloader: 3.19.0.0000
(bootloader) version-baseband: 1.21.21331147A1.19_2G
(bootloader) version-cpld: None
(bootloader) version-microp: None
(bootloader) version-main: 3.28.1540.5
(bootloader) version-misc: PVT SHIP S-ON
(bootloader) serialno: ***********
(bootloader) imei: **************
(bootloader) imei2: Not Support
(bootloader) meid: 00000000000000
(bootloader) product: m8_ul_ca
(bootloader) platform: hTCBmsm8974
(bootloader) modelid: 0P6B12000
(bootloader) cidnum: BS_US001
(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: df77f8b7
(bootloader) hbootpreupdate: 11
(bootloader) gencheckpt: 0
all: Done!
finished. total time: 0.188s
Edit:
Bootloader is unlocked but I wasn't me.
And when it boots up the logo says ''PTCi'' idk which carrier is, I'm not frum US.

TheSUlake said:
(bootloader) version-main: 3.28.1540.5
(bootloader) modelid: 0P6B12000
(bootloader) cidnum: BS_US001
Click to expand...
Click to collapse
The above info indicates the phone is the US Developer's Edition.
The Marshmallow (last official version released) RUU is here: http://dl3.htc.com/application/RUU_M8_UL_M60_SENSE70_MR_BrightstarUS_WWE_6.12.1540.4.exe
To install RUU, you will need to lock the bootloader with command: fastboot oem lock
If you still get any errors running the RUU, let me know. For some (most) US versions of the M8, you need to flash the Marshmallow firmware (radio, hboot, etc.) in order to upgrade to Marshmallow RUU. Don't remember if this requirement applied to the Dev Ed.
TheSUlake said:
Bootloader is unlocked but I wasn't me.
And when it boots up the logo says ''PTCi'' idk which carrier is, I'm not frum US.
Click to expand...
Click to collapse
You sure the boot splash screen doesn't say HTC? Although the HTC logo pretty clearly says HTC, so I believe you when you say it reads "PTCi" but just want to confirm. If you are seeing PTCi, it seems your phone has a different ROM installed (than the stock HTC Dev Edition ROM). Which would agree with the fact the bootloader has been unlocked. I'm not famililar with PTCi, so I can't be sure what the ROM differences are. But flashing the RUU should at least not have any affect on network connectivity (as ROM does not affect the network baseband). And the stock Dev Ed ROM (which will be installed by the RUU) is a pretty good one.