Originally Posted by cpu2007
Thank you for explaining.
So I understand that if there's no a compatible RUU, it will not be possible to downgrade to the stock firmware, does this mean that after using custom rom, if I endup with a higher bootloader, I can't get back to my stock firmware but only change from one custom to another custom rom?
Where do these RUU come from? aren't they supplied by HTC, I mean if someone has a device with stock firmware but want's to flash his/her phone again, how would they do it? (for example in iphones you can get stock firmware for every phone)
Is it there a way to create a RUU when I have a stock firmware so that in case I need to revert back I can use that?
I'm on version 4.1.1 i guess, which i think isn't the latest version, after going stock firmware, if I upgrade, will i get my bootloader upgraded too?
sorry for too many questions
Bootloader version is not rom version, custom roms won't update your bootloader. There's a difference between "firmware" and custom rom. you can update your phones firmware (bootloader etc.) with a cid matching "firmware.zip" from an OTA or RUU or on stock this is done automatically when applying OTA updates that include new versions of those. So if your bootloader version was too high, you can't use the RUU anymore and you have to get back to stock by using a stock TWRP/CWM backup and additionally flash stock recovery and boot.img and then relock your bootloader.
and yes RUUs are made by HTC, but there are no RUUs for latest software updates yet. either they don't exist or they're not leaked...
Your bootloader will probably be updatet to 1.35 if i remember right, but as long as the RUU includes the same version or a higher one, you're able to use it, so you can still use this RUU when used once.
just don't do OTA update to Sense 5/Android 4.2.2 or your bootloader will be upgraded to 1.72 and you won't be able to use any of those ruu again.
Don't forget to click the "Thanks"-Button if someone helped you!
Device: HTC One X+ (enrc2b)
ROM: Android Revolution HD
Recovery: TWRP 126.96.36.199