[HTCotta]

I was hoping it wouldn't come to a hard reset but if that's what i have to do i have a couple noob questions about it. I know how to do it and everything and i know it deletes everything. I already backed stuff up just in case but I was wondering will it go back to the original rom that came on the phone or will it revert to the 6.1 rom that I flashed on it. Also i will not need to re-activate it will I? (noobish I think but just covering my bases)