My Pre 2 blocked completely and the only solution was ti erase everything.
I managed to bypass the activation - and strange things, I was able to set Google account (including calendar and contacts) without need to do anything - the Oauth2 was still present and I need to introduce the credentials only.
But in few minutes after sync started, I received the message
Memory critical, too many cards!
Throw away cards to recover
and this message appear again and again doesn't matter if I restart the phone or not.
Obviously, I had no card opened.
Any solution for that?