Develop Bugs

Updating from an old KitKat based ROM? Do I need to be on stock?

I have a HTC One M8, that is running a very old version of Android Revolution (7.0, which is KitKat based). I would like to update to the newest version, but I'm getting conflicting answers on how should I do this. Some threads say I have to revert to stock, and some say I have to install the official OTA updates first, otherwise I might end up with non-working wifi, and some say I should use the RUU from the official HTC site.
Details of the phone:
S-ON
Rooted
Has TWRP installed (some old TWRP, can't update it because newest version get's stuck at entering recovery, I read that it is related to me having an old HBOOT version)
Current ROM is android revolution 7.0
CID is TMOB-101
Bootloader unlocked
I heard the easiest way to do it is to use the official HTC site to download a RUU, and use that, but in order to use that, you must relock your bootloader, but that can potentially brick the device if it was tampered with?
Can anyone clarify what should I do, and what should I look out for, to make sure I don't brick (like relocking the bootloader)?

You will need to restore a nandroid backup then do OTA to the latest.
Post fastboot getvar all result without serial & imei no.
Someone will be able to guide you.
Or I check tomorrow as I already in bed now.
Note : unlocking/relocking bootloader will not brick a device.

(bootloader) version: 0.5
(bootloader) version-bootloader: 3.16.0.0000
(bootloader) version-baseband: 1.16.2133156.UA10G
(bootloader) version-cpld: None
(bootloader) version-microp: None
(bootloader) version-main:
(bootloader) version-misc: PVT SHIP S-ON
(bootloader) serialno: hidden
(bootloader) imei: hidden
(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: c3d94491
(bootloader) hbootpreupdate: 11
(bootloader) gencheckpt: 0
all: Done!
finished. total time: 0.005s
I found a nandroid backup link here on XDA (http://forum.xda-developers.com/showthread.php?t=2701376) but the link for my CID is broken. Any other place I could get it? Googling just turns up more dead links.

whcv said:
(bootloader) version-bootloader: 3.16.0.0000
(bootloader) version-baseband: 1.16.2133156.UA10G
(bootloader) modelid: 0P6B10000
(bootloader) cidnum: T-MOB101
(bootloader) security: on
I found a nandroid backup link here on XDA (http://forum.xda-developers.com/showthread.php?t=2701376) but the link for my CID is broken. Any other place I could get it? Googling just turns up more dead links.
Click to expand...
Click to collapse
That if still available, not for your hboot version.
What you need to do is to restore 1.57.111.2 and its stock recovery then do multiple OTA up to the latest 4.19.111.3 or maybe 4.19.111.4
Download 1.57.111.2 TWRP backup - https://www.androidfilehost.com/?fid=95747613655045642
Download 1.57.111.2 stock recovery - http://forum.xda-developers.com/showpost.php?p=60211779&postcount=4
To understand more on how-to : http://forum.xda-developers.com/htc-one-m8/help/tutorial-how-to-stock-stock-twrp-t3086860
(read post #1)

ckpv5 said:
That if still available, not for your hboot version.
What you need to do is to restore 1.57.111.2 and its stock recovery then do multiple OTA up to the latest 4.19.111.3 or maybe 4.19.111.4
Download 1.57.111.2 TWRP backup - https://www.androidfilehost.com/?fid=95747613655045642
Download 1.57.111.2 stock recovery - http://forum.xda-developers.com/showpost.php?p=60211779&postcount=4
To understand more on how-to : http://forum.xda-developers.com/htc-one-m8/help/tutorial-how-to-stock-stock-twrp-t3086860
(read post #1)
Click to expand...
Click to collapse
Thanks a lot, going to try it soon. Out of curiosity, how did you figure out I need 1.57.111.2? I don't see that number mentioned anywhere in my getvars output.

whcv said:
Out of curiosity, how did you figure out I need 1.57.111.2?
Click to expand...
Click to collapse
Your hboot is 3.16.0000
and baseband is 1.16.2133156.UA10G

ckpv5 said:
Your hboot is 3.16.0000
and baseband is 1.16.2133156.UA10G
Click to expand...
Click to collapse
Sorry I'm thick, I still don't see the relationship between the numbers :/
One more question, I have read that I need to relock the bootloader, for the OTA updates to work, is that correct?

whcv said:
Sorry I'm thick, I still don't see the relationship between the numbers :/
One more question, I have read that I need to relock the bootloader, for the OTA updates to work, is that correct?
Click to expand...
Click to collapse
Where do you read you need to relock bootloader ? I asked you to read my thread post #1, there is a note on bootloader matter. No need to relock bootloader.
How do I see the relationship ? That come from observation and experience ... the outcome that I learnt from my own thread ....
See all those software version no. in post #2 in my thread
hboot 3.16.0000 - software version no. is 1.xx.xxx.x
hboot 3.18.0000 - software version no. is 2.xx.xxx.x
so yours is hboot 3.16.0000 and CID T-MOB101 so the software version no. is 1.xx.111.x
and the precise version no. is 1.57.111.2
That's all that I can help ... as this way off-topic from your original problem.

Okay, I managed to install all the OTA updates, but I'm only on android version 5.0.1, and now it says there are no more updates for my system.
I thought the OTA updates were supposed to update me to 6.x?

whcv said:
Okay, I managed to install all the OTA updates, but I'm only on android version 5.0.1, and now it says there are no more updates for my system.
I thought the OTA updates were supposed to update me to 6.x?
Click to expand...
Click to collapse
The update to Android 6.0 not yet available for your device variant/region.
So far only 4 device variants received the update :
Developer Edition
Taiwan
Bell Canada
Rogers Canada
If you want to taste Marshmallow ROM, you install TWRP 2.8.7.0 and install any customized Marshmallow ROM that you like. Just make a nandroid backup of your current stock non-rooted ROM before you install other ROM. You need this backup for next OTA.

I see.
Are there no caveats, like my wifi not functioning if I install a marshmallow rom now, without waiting for the OTA update first?

I would not suggest that if there are problems in doing so.

Please Help: HTC One M8

Its been few days that I am going through HTC M8 forums and nothing seems to help. I got a HTC One M8 which is rooted now there are updates available but they won't install because its a custom software and I should revert to Official stock.
My Question is Simple, How can I revert to original stock?
My Phone is S-OFF
****Unlocked****(But I can lock if needed)
Software Number: 4.16.401.10
HTC Sense 6.0
CID:1111111
I have TWRP recovery 3.2 installed.
Somebody, anybody please give me a link to Rom that will take me back to official and Can I actually install Marshmallow?
Any help is appreciated.
:::Life is so much easier with samsung but I just love this phone.

cryptdweller said:
Its been few days that I am going through HTC M8 forums and nothing seems to help. I got a HTC One M8 which is rooted now there are updates available but they won't install because its a custom software and I should revert to Official stock.
My Question is Simple, How can I revert to original stock?
My Phone is S-OFF
****Unlocked****(But I can lock if needed)
Software Number: 4.16.401.10
HTC Sense 6.0
CID:1111111
I have TWRP recovery 3.2 installed.
Somebody, anybody please give me a link to Rom that will take me back to official and Can I actually install Marshmallow?
Any help is appreciated.
Click to expand...
Click to collapse
Excellent guide and needed files to return to stock for OTA: http://forum.xda-developers.com/htc-one-m8/help/tutorial-how-to-stock-stock-twrp-t3086860
Now the question is, which stock backup and recovery do you need to use? Is the version number you posted (4.16.401.10), the OS number shown on the bootloader screen (this is what you want to match) or is it the software number in Settings?
No need to relock bootloader to OTA. And since you are s-off, there is really no reason to relock; and I do not recommend relocking (it actually doesn't "enable" anything to relock, that s-off already doesn't allow - but if you relock, that will prevent you from flashing things like custom recovery).
cryptdweller said:
:::Life is so much easier with samsung but I just love this phone.
Click to expand...
Click to collapse
Every device has its nuances, and learning curve. When I got my first Samsung device, I didn't know what Odin or any of that was, and had to learn.

thank you mate, I'll go through the link and i hope it works...
Oh its the Software number in the setting that I have written here, can I download any rom or should I match the number?
Thank you again.

cryptdweller said:
thank you mate, I'll go through the link and i hope it works...
Oh its the Software number in the setting that I have written here, can I download any rom or should I match the number?
Click to expand...
Click to collapse
You definitely can NOT install any ROM, if you want OTA updates. You need to match the version number shown under "OS" on the bootloader screen.
Additionally, SuperCID does not make the phone "universal" (as you suggested in your PM to me). You need to match the firmware version number (OS number on bootloader screen, as mentioned) and you need to also match MID, in order for OTAs to work.
What does it say for OS on the bootloader screen?
If you installed a custom ROM, the software number in Settings won't match the OS number on the bootloader screen. The software number in Settings just refers to the custom ROM, which is pretty much irrelevant when returning to stock for OTA.

M8_UL PVT SHIP S OFF
CID 111111111
HBOOT - 3.19.0.0000
OS:4.28.502.1
How do I check the MID?

cryptdweller said:
M8_UL PVT SHIP S OFF
CID 111111111
HBOOT - 3.19.0.0000
OS:4.28.502.1
How do I check the MID?
Click to expand...
Click to collapse
Do fastboot getvar all, and post the results (delete IMEI and serial number before posting). I need to see more info, not just the MID, in order to see what's going on. Reason being, the OS number (x.xx.502.x) is for the AT&T version, but the product ID is not (AT&T version is M8_UL_CA).

< waiting for device >
(bootloader) version: 0.5
(bootloader) version-bootloader: 3.19.0.0000
(bootloader) version-baseband: [email protected]
(bootloader) version-cpld: None
(bootloader) version-microp: None
(bootloader) version-main: 4.28.502.1
(bootloader) version-misc: PVT SHIP S-OFF
(bootloader) serialno:
(bootloader) imei:
(bootloader) imei2: Not Support
(bootloader) meid: 00000000000000
(bootloader) product: m8_ul
(bootloader) platform: hTCBmsm8974
(bootloader) modelid: 0P6B13000
(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: 6768a7b1
(bootloader) hbootpreupdate: 11
(bootloader) gencheckpt: 0
all: Done!
finished. total time: 0.197s

Wow, well it looks like it was originally a T-Mob US version, made s-off and SuperCID, flashed with AT&T firmware, and Euro based custom ROM installed.
Complicated, eh?
How you return to "stock" (and what "stock" means) is somewhat up to you, and also the requirements of your local carrier.
Do you know what bands your carrier uses for 3G and LTE?

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.

Need help to return to stock rom

Hello,
I bought a M8s (m8ql_ul), but I found it rooted.
How can I return to stock rom ?
The OS version is unknown : the version-main is empty (listed by : fastboot getvar all)
My M8s is :
- Unlocked
- Rooted
- S-ON
------------------------------
version-bootloader: 3.19.0.0000
version-baseband: [email protected]
version-main:
version-misc: PVT SHIP S-ON
serialno: ---------
imei: -------------------------
product: m8ql_ul
platform: hTCBmsm8939
modelid: 0PKV10000
cidnum: HTC__102
security: on
--------------------------------
Can I use an international stock rom x.x.401.x ?
Do you have a link to it ?
Thank you.

TF85 said:
Hello,
I bought a M8s (m8ql_ul), but I found it rooted.
How can I return to stock rom ?
The OS version is unknown : the version-main is empty (listed by : fastboot getvar all)
My M8s is :
- Unlocked
- Rooted
- S-ON
------------------------------
version-bootloader: 3.19.0.0000
version-baseband: [email protected]
version-main:
version-misc: PVT SHIP S-ON
serialno: ---------
imei: -------------------------
product: m8ql_ul
platform: hTCBmsm8939
modelid: 0PKV10000
cidnum: HTC__102
security: on
--------------------------------
Can I use an international stock rom x.x.401.x ?
Do you have a link to it ?
Thank you.
Click to expand...
Click to collapse
Its out there. I put it on the sd external card. I rename it 0PKVIMG.zip and start into bootloader where it gets read instantaneously and begins to install the sense 7.0 Android 6.0. IF you have first relocked your bootloader at htcdev .
It is explained by htcdev
You can do it too as I did.

Hello,
Then I can try with any stock rom having the Sense 7 and Android 6 ?
Like : 2.10.401.1
Thank you

TF85 said:
Hello,
Then I can try with any stock rom having the Sense 7 and Android 6 ?
Like : 2.10.401.1
Thank you
Click to expand...
Click to collapse
There is only one I have seen that is out there to download. It worked and my phone can be completely restored to the basic MM. It then immediately prompts to update as it is the initial MM 6.0 to start. Then it may update a 2nd time. It is sense 7 and android 6 Marshmallow. It is EU vsn. Don't know about other continents and carrier versions.

Hello,
I downloaded this one :
0PKVIM[email protected]60201_20.05_018_F_release_479349_combined_signed.MD5.zip
I'll try do flash it.
thank you

TF85 said:
Hello,
I downloaded this one :
0PKVIM[email protected]60201_20.05_018_F_release_479349_combined_signed.MD5.zip
I'll try do flash it.
thank you
Click to expand...
Click to collapse
How did it go? Did it went?

Hello,
I downloaded it at this link :
https://www.androidfilehost.com/?fid=24591023225176246
Good luck

Did it work for you ? I'm also trying to go back to stock on my m8s. Tell me how did you do it if it worked.

Hello,
I could not flash it, TWRP print several errors.
I tried the TWRP-4.16.401.13.zip, TWRP sent me errors like : <Could not find "META-INF/com/google/android/update-binary" in the zip file>
No idea.

Hello,
I had to lock the bootloader, before flashing the zip file.
This flash is now installed (0PKVIM[email protected]60201_20.05_018_F_release_479349_combined_signed.zip), and it works.
This version is compatible with these CID :
HTC__001,
HTC__102,
HTC__032,
HTC__Y13,
HTC__031,
HTC__M27,
HTC__002,
HTC__A07.
and for the modelid : 0PKV10000
The OTA will work.
How to do :
This flash is for
Firstly, charge the M8s to 100%.
1- Lock the bootloader, it became "RELOCKED".
2- With your PC, copy this zip file into an SD card, remane it : 0PKVIMG.zip (it starts with zero)
3- Insert the sd card into M8s and boot into bootloader,
4- It takes at least 10 minutes to finish the new flash.
Good luck.

I want to flash the same version too but when I relock the bootloader there is some bugs that make that the flash doesn't work. Please help.

Need STOCK 6.0 ROM for HTC One M8.. No Software Upgrade Option Available

I have HTC One M8 (M8_UL) (2nd Hand). I don't know whether it is genuine or not.
Android: 4.4.4
HTC Sense Version: 6.0
Software Number: 3.28.401.9
HTC SDK API Level: 6.25
CID-11111111
HBOOT-3.19.0.0000
KTU48P Release Keys
Recovery: Stock 3.28.401.9
Rooted
I want Stock Android 6.0 but there is no option to get Software Upgrade. I have tried RUU.exe but it failed.. Please help me. Country: Pakistan

Salman Akbar said:
I have HTC One M8 (M8_UL) (2nd Hand). I don't know whether it is genuine or not.
Android: 4.4.4
HTC Sense Version: 6.0
Software Number: 3.28.401.9
HTC SDK API Level: 6.25
CID-11111111
HBOOT-3.19.0.0000
KTU48P Release Keys
Recovery: Stock 3.28.401.9
Rooted
I want Stock Android 6.0 but there is no option to get Software Upgrade. I have tried RUU.exe but it failed.. Please help me. Country: Pakistan
Click to expand...
Click to collapse
What error message did you get when trying the RUU?
Is your software number from settings > about? What does it say next to "OS" in bootloader? Or alternatively, what do you get with fastboot getvar version-main?

Says that "get the correct ROM Update Utility for your device".
my model id is OP6B63000 and OS is 3.28.401.9

Salman Akbar said:
Says that "get the correct ROM Update Utility for your device".
my model id is OP6B63000 and OS is 3.28.401.9
Click to expand...
Click to collapse
help me please

Salman Akbar said:
Says that "get the correct ROM Update Utility for your device".
my model id is OP6B63000 and OS is 3.28.401.9
Click to expand...
Click to collapse
You can't just run any RUU, it has to be intended for your device's specific MID and CID.
You also have not stated what exact version number RUU you tried to run.
You haven't been clear about how you are determining the model ID (MID) or OS number.
How did you determine the MID? How did you determine the OS number?
Best way is fastboot getvar all
In fact, it's best to perform the command, and post the results (delete IMEI and serial number before posting).

I have tried to install v6.12.1540.4 (.exe) downloaded from the HTC website.
I have got this info through "fastboot getvar all" method

Salman Akbar said:
help me please
Click to expand...
Click to collapse
I'd like to help, but you need to reply/quote me so I get a notification.
---------- Post added at 09:16 AM ---------- Previous post was at 09:15 AM ----------
Salman Akbar said:
I have tried to install v6.12.1540.4 (.exe) downloaded from the HTC website.
I have got this info through "fastboot getvar all" method
Click to expand...
Click to collapse
Your getvar information is missing from this post

xunholyx said:
I'd like to help, but you need to reply/quote me so I get a notification.
---------- Post added at 09:16 AM ---------- Previous post was at 09:15 AM ----------
Your getvar information is missing from this post
Click to expand...
Click to collapse
version-microp: None
version-main: 3.28.401.9
version-misc: PVT SHIP S-OFF
serialno:
imei:
imei2: Not Support
meid: 00000000000000
product: m8_ul
platform: hTCBmsm8974
modelid: 0P6B63000
cidnum: 11111111
battery-status: good
battery-voltage: 0mV
partition-layout: Generic
security: off
build-mode: SHIP
boot-mode: FASTBOOT
commitno-bootloader: df77f8b7
hbootpreupdate: 11
gencheckpt: 0

xunholyx said:
I'd like to help, but you need to reply/quote me so I get a notification.
---------- Post added at 09:16 AM ---------- Previous post was at 09:15 AM ----------
Your getvar information is missing from this post
Click to expand...
Click to collapse
Is this information enough.?

Salman Akbar said:
Is this information enough.?
Click to expand...
Click to collapse
Your MID is for the Asia version M8, while your current firmware is for Euro version.
So which stock 6.0 ROM (Asia or Euro) to install is somewhat up to you. But if it's working on the current Euro firmware, you might want to stick with Euro (flashing another region RUU will change network band support).
If you want to stay on Euro ROM, use the RUU and instructions here: https://forum.xda-developers.com/showpost.php?p=64926626&postcount=6
Otherwise, if you want the Asia ROM, use the RUU zip for here (but use the same process with htc_fastboot as the previous method - just with the following RUU zip): https://forum.xda-developers.com/showpost.php?p=70983904&postcount=7616

redpoint73 said:
Your MID is for the Asia version M8, while your current firmware is for Euro version.
So which stock 6.0 ROM (Asia or Euro) to install is somewhat up to you. But if it's working on the current Euro firmware, you might want to stick with Euro (flashing another region RUU will change network band support).
If you want to stay on Euro ROM, use the RUU and instructions here: https://forum.xda-developers.com/showpost.php?p=64926626&postcount=6
Otherwise, if you want the Asia ROM, use the RUU zip for here (but use the same process with htc_fastboot as the previous method - just with the following RUU zip): https://forum.xda-developers.com/showpost.php?p=70983904&postcount=7616
Click to expand...
Click to collapse
Ok I have downloaded the EURO version and I will try to flash it with the given method..
1 more question: Can I install this "RUU_M8_UL_M60_SENSE70_MR_BrightstarUS_WWE_6.12.1540.4.exe" on my device???
version-microp: None
version-main: 3.28.401.9
version-misc: PVT SHIP S-OFF
serialno:
imei:
imei2: Not Support
meid: 00000000000000
product: m8_ul
platform: hTCBmsm8974
modelid: 0P6B63000
cidnum: 11111111
battery-status: good
battery-voltage: 0mV
partition-layout: Generic
security: off
build-mode: SHIP
boot-mode: FASTBOOT
commitno-bootloader: df77f8b7
hbootpreupdate: 11
gencheckpt: 0

redpoint73 said:
Your MID is for the Asia version M8, while your current firmware is for Euro version.
So which stock 6.0 ROM (Asia or Euro) to install is somewhat up to you. But if it's working on the current Euro firmware, you might want to stick with Euro (flashing another region RUU will change network band support).
If you want to stay on Euro ROM, use the RUU and instructions here: https://forum.xda-developers.com/showpost.php?p=64926626&postcount=6
Otherwise, if you want the Asia ROM, use the RUU zip for here (but use the same process with htc_fastboot as the previous method - just with the following RUU zip): https://forum.xda-developers.com/showpost.php?p=70983904&postcount=7616
Click to expand...
Click to collapse
I opened command prompt from RUU folder (shift+right click) and typed this: " fastboot reboot-bootloader " (without quotations) but it says that: 'fastboot' is not recognized as internal or external command, operable program or batch file.
What to be done now?

Salman Akbar said:
I opened command prompt from RUU folder (shift+right click) and typed this: " fastboot reboot-bootloader " (without quotations) but it says that: 'fastboot' is not recognized as internal or external command, operable program or batch file.
What to be done now?
Click to expand...
Click to collapse
Try adb reboot-bootloader
You have to be in bootloader for fastboot commands to work. If you are booted to your system/ROM, then adb comands apply

xunholyx said:
Try adb reboot-bootloader
You have to be in bootloader for fastboot commands to work. If you are booted to your system/ROM, then adb comands apply
Click to expand...
Click to collapse
Ok this problem is solved.. now another problem:
-----------------------------------------------------------
E:\RUU>htc_fastboot flash zip RUU.zip
sending 'zip'... (53965 KB) OKAY
sending time = 2.832 secs
writing 'zip'... (bootloader) zip header checking...
(bootloader) shift signature_size for header checking...
(bootloader) zip info parsing...
(bootloader) checking model ID...
FAIL41 model id check fail
FAILED (remote: 41 model id check fail)
Execution time is 3(s)
E:\RUU>
-----------------------------------------------------------

Reply please.. would I have to change the Model ID.??

Salman Akbar said:
Ok this problem is solved.. now another problem:
-----------------------------------------------------------
E:\RUU>htc_fastboot flash zip RUU.zip
sending 'zip'... (53965 KB) OKAY
sending time = 2.832 secs
writing 'zip'... (bootloader) zip header checking...
(bootloader) shift signature_size for header checking...
(bootloader) zip info parsing...
(bootloader) checking model ID...
FAIL41 model id check fail
FAILED (remote: 41 model id check fail)
Execution time is 3(s)
E:\RUU>
-----------------------------------------------------------
Click to expand...
Click to collapse
I tried to flash the Euro version RUU.zip that was recommended by redpoind73 but it failed "FAIL41"

Salman Akbar said:
Reply please.. would I have to change the Model ID.??
Click to expand...
Click to collapse
With s-off and superCID you shouldn't have to.
What RUU are you trying to flash? Maybe give a link to where you downloaded it from.

xunholyx said:
With s-off and superCID you shouldn't have to.
What RUU are you trying to flash? Maybe give a link to where you downloaded it from.
Click to expand...
Click to collapse
The Guide:
https://forum.xda-developers.com/showpost.php?p=64926626&postcount=6
The download link:
https://www.androidfilehost.com/?fid=24369303960687057

Salman Akbar said:
The Guide:
https://forum.xda-developers.com/showpost.php?p=64926626&postcount=6
The download link:
https://www.androidfilehost.com/?fid=24369303960687057
Click to expand...
Click to collapse
My bootloader is RELOCKED. Should I UNLOCK it?

Salman Akbar said:
My bootloader is RELOCKED. Should I UNLOCK it?
Click to expand...
Click to collapse
This won't help the RUU to run. Unlocked bootloader would actually prevent the RUU from installing on a s-on device. Since your phone is s-off, it bypasses that limitation, so it doesn't matter either way (RELOCKED, LOCKED or UNLOCKED) and the RUU will still install if other requirements are met.
You probably need to change the MID. SuperCID usually bypasses the MID check, but not always. This appears to be one of the instances.