You can get it
[ROM]RUU_Mecha_GINGERBREAD_S_VERIZON_WWE_2.10.605.1_Rad io_0.01.78.0802w_3_NV_8K_1.41 - xda-developers it is a program that runs on your computer that will update your phone Rom Update Utility I think. It should get you back at least to a leak you could have installed if you were stock
yes,this is the tpye of file im refering to,but i dont think id recceomend using the leak GB RUU to return to verizon. while it can be applied by nonrooted,stock phones,im not sure if it is "legal" to have done this(read:voiding your warranty)
Should be able to use one of these. The one at the very bottom is the MR1 OTA RUU
[RUU] All known Mecha RUUs & OTAs (signed only) 5/16/2011 - xda-developers
Those are zip files I belive they would need to be flashed in hboot, without access to the volume keys hboot would not be something you could get to...perhaps via ADB you could but scotty will need to chime in on that
exactly. all the files in the link above are PG05IMG files and need to be flashed in hboot. the absolute safest thing would be to download the 1.12.605.6 PG05IMG(i know it wont cause a security warning) then run any of the other utilitys. at the step before you chose to flash the rom ,youd find "rom.zip" in a temp file that the installer created,then replace it with the 1.12.605.6 PG05IMG renamed to "rom.zip",then continue running the installer.
i searched for a .exe file of 1.12.605.6 and was unforutnately unable to find one.
there are mr1,mr2,and a couple other versions that im reluctant to recomend.
assuming you are running a stock,rooted mr2(firmware 1.70.605.0) i think it would be safe to run that one. im afraid mr1,or one of the others may casue a
security warning that may be difficult or impossible to recover from with no volume rocker.
you need to be very careful when flashing RUUs that will overwrite the bootloader,as some when flashed overtop of custom firmware will become confused and lock the phone down with the
security warning
heres a little info on running the .exe RUU file:
http://www.htc.com/uploadedFiles/US/Support/Detailed+RUU+Instructions+03302009.pdf
and you can download the mr2 .exe from here:
[ROM]RUU_Mecha_S_VERIZON_WWE_1.70.605.0_Radio_0.01.69.0 625r_NV_8K_1.41_9K_1.64 - xda-developers
basically all you do is downlad the file,then click it. it will run,and then just follow the prompts. make sure youre battery is close to 100% charged before running it.