I have a Stratosphere that I rooted a while back, but ever since, it has not been able to perform a system update. It would restart and everything, but then the update notification would still be there.
I tried unrooting it, which at least got rid of the warning symbol when it boots, but it's still stuck on 2.3.5. (Although the update notification has disappeared).
I checked if it was still rooted, and ConnectBot still lets be do su, so it looks like the unroot didn't work.
Why can't I unroot?