[Windows Phone 8 Development and Hacking] compu829:
[MENTION=5440299]hutchinsane_[/MENTION] Got my phone back from HTC last Thursday (FINALLY!) They definitely sent me a "new" one? (different serial number and IMEI, "old" SIM Tray..rest of phone looks brand new)

I have been faithfully using my Lumia 521, and now I am afraid the HTC one will die again lol. T-Mobile still hasn't pushed GDR3 yet...they deny it even exists! There are a few Canadian carriers that use AWS though. Depending on what is signed in the ROM, I might be able to remove the radio partition entirely and tell it not to flash. Then I can Y-Cable flash it and put the stock HTC firmware on it.

Floating around somewhere is an old pre-production WP8 ROM that was leaked for the HTC 8x. Some folks were able to port this ROM onto their WP7.8 devices. The original thread was located at http://xdaforums.com/showthread.php?t=1968578 (says invalid thread specified, now)

I think this is the file that was leaked...http://www.tweaksparadise.com/download/anaheiim/?action=load&file=6555

*EDIT* Soo...it looks like all the 8X ROMs don't have bitlocker enabled on the MainOS partition...I just opened the 1.0 and 2.0 roms in HEx Editor Neo and they both are missing the -FVE-FS- signature (searched as ANSI and Unicode). It all is NTFS. The ROMs I checked were "RUU_ACCORD_U_APO_00_HTC_Europe_1.00.401.24_1.10.32.19.19_3_15.39.32_RELEASE" (Pre GDR1)and "RUU_ACCORD_U_APO_00_HTC_Europe_2.00.401.03_1.11b.32.19.23_2_15.42.32_RETAIL_ENC_RELEASE" (GDR1) http://hamaitung.wordpress.com/2013...l-rom-for-bricked-htc-8x-after-updating-gdr2/ <-- Has download links for Europe and Asian versions

I do know that some signature checks are occurring when run with the RUU because if I try and change the variant it will work on, it will complain of a checksum error.

More thoughts:

The T-Mobile branded Lumia 810 has identical hardware to the T-Mobile branded HTC 8x (Even down to the radio and supported bands! the only difference is literally the screen resolution and type (AMOLED 480 vs TFT 720). I am wondering if I replace the MainOS partition in the Accord RUU with the one from the Nokia FFU If it will flash and boot? The 8x also shares the same HW as the non-LTE Ativ S. If their MainOS partition is also not encrypted, perhaps we can get the Samsung partition on there and use the current InteropUnlock method for HTC. source: http://pdadb.net/index.php?m=pdacomparer&id1=4742&id2=3814&id3=3889&id4=3921

I was also able to cross-reference some Lumias to the HTC 8S (same processor, RAM, CPU, GPU, Screen size, etc). http://pdadb.net/index.php?m=pdacom...3=4273&id4=4272&id5=4033&id6=3872&del_id=5258. I believe the MainOS partition in the Lumia is not Bit-Locker encrypted in their FFU. If you are feeling adventurous, you might want to see if you can cook a Lumia ROM with enough of the HTC bits that the flasher will accept it. I'd start with just seeing if the MainOS partition will work. (bit locker vs no bit locker). Then maybe try MainOS + Radio. (I am really interested in MainOS + Radio). Don't forget to check and see if the partition offsets match between the 8S and Lumia ROMs, or you will potentially flash over something important leaving you with a brick.