Originally Posted by MerkyBlud
Why the worry, out of interest?
better safe than sorry. the guys just want to make sure that they dont have you do something that could make any change of recovery more difficult(like raising the main version) or that may actually make things worse(like flashing a rom incompatible with the device,or flashing a wrong radio or hboot)
in this particular case nothing bad really could have happened. if you had tried to run the ruu ral linked,it would have simply failed with a "main version older" error,or a CID error if youd tried flashing a different carrier ruu.
ill look a lil more later,but i havent been able to find your exact ruu either. the important info is this:
INFOversion-main: 2.50.771.2 <- we need to flash an ruu with this build number or higher
INFOcidnum: H3G__001 <- we need an ruu that is compatible with this carrier id,or we need to make a gold card.
INFOsecurity: on <- this prevents it from being easy ;)
so basically at this point we have 2 options:
1)install htc compatible hboot and install a recovery. at that point we can try and install a rom,wich prolly will not work. what we can do with the booted recovery is use adb to change the main version to a lower one so we can flash the ruu ral provided,wich will match the cid.
2)create a gold card and simply flash any ruu thats got a higher main version,like this one: RUU_Ace_Gingerbread_S_KT_KR_2.52.1010.2_Radio_12.5 9.60.26_26.11.04.21_M_release_201461_signed.exe - download now for free. File sharing. Software file sharing. Free file hosting. File upload. FileFactory.com
the big disadvantage of #1,is that if your device shipped with GB,it will goof you up,possibly unrecoverably,so you need to be 100% sure it shipped to you with froyo. other than that,the htcdev unlock and adb commands are fairly simple.
the only disadvantage of #2,is that it can be somewhat tricky to make a functioning gold card: directions
and you will need another phone to use to do it.
if you go the gold card route,use the app goldcard helper from market. if you use it skip right to the step of "Go to this page and enter this new number into the SD Card Serial (CID) field" and enter the output of the sdcard cid for mmc2 into the goldcard generator site.
i personally would just pick up a small spare sd to use for this. its not really worth the effort of backin up,transfering,etc. the contents of your current sd to make it into a gold card.