[AT&T, Rogers HTC One X, Telstra One XL] sN_iPower:
Why is my HTC One x (PROTOTYPE) stuck on ICS?

Hey guys, This is my first post ever on XDA so please forgive me if I sound like an idiot

I got hold of a HTC One x which was already had an unlocked bootloader, rooted and had CWM recovery installed. I was told that I have a prototype version of the one x. Anyway that is not issue. when I got the phone it was running android version 4.0.4 HTC Sense version 4.1 and I checked software update. The 3.14.401.27 OTA update was available so I proceeded with the update and after the reboot I found my phone stuck in a bootloop and the only way for me to sort it out was by restoring my nand back up from CWM. I really wanted the new Sense 5 UI and android jelly bean so I downloaded:

RUU_ENDEAVOR_U_JB_45_S_hTC_Asia_TW_3.14.709.20_Rad io_5.1204.162.29_release_292865_signed.exe

My CID was HTC__621 thats why I downloaded that ruu but after flashing it not was I only stuck in a bootloop but also when I entered recovery mode it was just a blank black screen with the back lights on. I even flashed different versions of CWM recovery and TWRP which gave me the same black screen so I flashed the stock recovery.img which also gave me the same black screen. I thought me maybe a different Ruu would resolve this issue so I used 'JBFWTOOL21' to change my CID to '11111111' this allowed me to flash:

RUU_ENDEAVOR_U_JB_45_S_HTC_Europe_3.14.401.27_Radi o_5.1204.162.29_release_298897_signed.exe

&

RUU_ENDEAVOR_U_JB_45_S_HTC_Europe_3.14.401.31_R_Ra dio_5.1204.162.29_release_302015_signed.exe

After trying both these ruu's I still found my device stuck in a bootloop. Next I downloaded 'Endeavoru_CustomRUU' this contained a 'rom.zip' which I belive was a jelly bean rom and said it would update my image version to '3.14.401.31' after flashing this ruu, my phone booted up past the 'HTC Quietly Brilliant' screen but into a black screen but I could hear the boot sound and knew it booted up but it still gave me a black screen. barre in mind this was the only rom that booted up and didn't get stuck in a bootloop but the downside was I had no picture on the screen it was literally pitch black with the backlight on when it went past the 'HTC Quietly Brilliant' boot screen. I didn't even see the one x boot animation. I could only hear the boot up sound and once it was booted up the notification LED would flash I was receiving network settings from my operator. That was about it. I booted into recovery to see wether that worked but unfortunatelly it was also still giving me a black screen. The only thing I could boot into without a problem was 'power button + volume down' which booted into bootloader in which I chose 'fastboot' to flash all these roms.

At this point I thought my device was soft bricked so I gave it to my friends father who happened to really good with his IT skills. He managed to change my device's CID from 'HTC__621' to 'HTC__001' after doing so he downloaded this ruu and flashed it:

RUU_ENDEAVOR_U_ICS_40_S_HTC_Europe_2.17.401.2_Radi o_2.1204.135.20_release_274900_signed.exe

This ruu turned out to work perfectly fine with my device. Everything functioned once again, the device was able to boot into recovery and boot normally without a hassle. I also discovered that this was the rom that I received my phone with which put me back to the start on android 4.0.4

I was really annoyed with the fact that I was stuck on ICS so I flashed the MaximusHD 21.1.0 rom and its boot.img which put me into a bootloop again. I also tried other custom roms such as Revolution and SD secxces which all put my phone in a bootloop even though I flashed their boot.img kernels. I knew that I required a hboot 1.33.0000 or above in order to flash jb roms so I used 'JBFWTOOL21' once again before flashing these custom roms to update my hboot from 1.12.0000 to 1.33.0000. so all these bootloops still occourd after doing all this and I just had to return back to ICS. barre in mind I only tried flashing JB roms as I want sense 5 so I don't know if a custom ics rom would work on my device as I havent tried it yet but I know for a full fact that none of the jb roms work on my device.

For those who are wondering here, I uploaded some pictures of my device just check the attachments. It has all the information you may want to know about my device (HTC One X PROTOTYPE).

I really hope someone can help me update to jelly bean and get sense 5 as I am frustrated from failing and being stuck in bootloops

If you read all of this I honestly appreciate it and Thank you for it, I hope you can help me!