[One (M7) General] d3adm@n:
Wanna convert to Dev Edition or EU Unlocked/Unbranded/GPE? There's a million question's and problem's constantly being posted about these conversion's. I have made this whole process as easy and painless as possible.As I have already done 90% of the work for you.Anyone should very easily be able to achieve full conversion and receive future ota's as well as return full stock.These are 100% clean stock's NO ROOT.Will boot directly to setup screen.These are done using TWRP backup to ensure complete and easy conversion.

How to convert-------

1...Select version,download and unzip,place folder in TWRP folder on sd.

2... Reboot to fastboot Change MID to required MID, instruction's can be found here-------->> thanks to [MENTION=641881]Shadowboy[/MENTION]23 --->>> http://xdaforums.com/showthread.php?t=2322820

A quick lesson on engineering HBoot if used to change MID. As stated on OP,your screen will go black DON'T PANIC!! Hold power button until you hear Windows chime and you will see HTC logo in oem ruu,then fastboot cmd can continue.

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2.5.... For a much easier CID/MID change without Eng Hboot thanks to [MENTION=5345690]Wonders_Never_Cease[/MENTION]. Download needed HBOOT from here--->> http://rumrunner.us/hboots/ It only needs to match needed provider,new hboot updates with firmware install. Install choosen Hboot,change MID/CID as needed. See commands at bottom.

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3... Reboot to fastboot and flash respective firmware found here---------->> thanks to [MENTION=2721660]godfirst[/MENTION] for the collection --->>> http://xdaforums.com/showthread.php?t=2419699

4...Flash backup,reboot and profit!!!!

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Developer Edition Coversion/Target CID BS_US001 ota's will take with 11111111 / Target MID PN0712000 (Mandatory for ota)

Downloads-- 4.19.1540.9

Rom----- http://www.androidfilehost.com/?fid=23329332407580891

Stock Recovery for OTA--- http://www.androidfilehost.com/?fid=23329332407580889

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EU Unlocked Unbranded Conversion/Target CID HTC_001 will take ota's on 11111111 / Target MID PN0710000 (Mandatory for ota)

Downloads-- 4.19.401.9

Rom---- http://www.androidfilehost.com/?fid=23329332407580890

Stock Recovery for OTA---- http://www.androidfilehost.com/?fid=23329332407580888

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GPE Conversion/Target CID GOOGL001 will take ota on 11111111 / Target MID PN0712000 (Mandatory for ota) thanks to [MENTION=3537886]graffixnyc[/MENTION] for the RUU

Download---3.62.1700.1

Rom--->>

Stock Recovery for ota--->>

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If I have made conversion easier for you,or you appreciate the effort. Please rate 5 star and maybe give a thanks.

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Fastboot commands for Hboot,CID,MID change Im expecting you to already know how to access adb and fastboot on your PC so commands are listed as i use them.

cd/android <--------- access to my adb fastboot

fastboot oem rebootRUU

fastboot flash zip Hboot.zip

fastboot oem writecid <---- not really needed stay with CID 11111111

fastboot oem writemid <--- Needed to OTA

fastboot erase cache

fastboot reboot.