I managed to successfully sync my calendar in Google Chrome with my calendar on my Samsung Ace (s5830i) but the latter has stopped syncing altogether, i.e. the phone calendar is now blank where it was previously working correctly. I've accessed settings and sync is checked. I do not have 2-step verification. My only thought is that sync may have been "lost" when I put the calendar into a folder (using the phones own folder set-up procedure). I cannot be sure that the two are related in terms of timing though. Any help/thoughts would be appreciated.