Okay, so before I say anything else, I'll say I'm a complete noob to this; I'm just trying to verify what I've gleaned from a a few hours of frantic research.
So, I recently bought a used HTC Thunderbolt (S-off with 4ext recovery), and it works fine, except for just a couple hours ago, it rebooted itself and came back with a screen that said:
Finding update package....
Opening update package...
assert failed: check_cid(getprop("ro.cid")), "00000000" , "11111111" .....
"99999999", "VZW__00`") == "t"
E:Error in /cache/fumo/OTAPkg.zip
Since then, I haven't been able to get it to stop doing that, so I've been looking around trying to find a way to fix it, or at least make it usable. And I think I've come up with something; I just want to check here to make sure I won't be colossally screwing something up, or if someone has a better plan, that would be great, too.
So, from what I've read, I should be okay if I flash an official Android RUU by adding it to the SD card with my computer then putting it back in the phone and using "install from sdcard".
Is this right? An answer ASAP would be greatly appreciated.