I just upgraded my SGS2 to 4.1.2 and I have huge problems synchronizing my Google calendar.
First of all, my Google calendar app disappeared. Until here ok, I reinstalled it from Google Play. When I try to add my google calendar accounts, they are just not there.
I try in Settings→Accounts→Google and choose my Google account to see the sync options inside. The option "Sync Calendar" does not exist anymore.
Did anyone have this problem? How did you solve it?