please read and it works on me .
after u restore idroid v.2 try to sign in to google account , try to open talk and download on market .. if u found problem on both please restart ur phone and do this way :
1. go to root xplorer/data/system/(find file named : "accounts.db) DELETE THIS FILE ! ..
2 and go to data/system/sync (folder)/(find accounts.xml (DELETE THIS FILE)
3. reboot phone ..
4. go to setting/app/manage app/tab ALL and find :
browser,calendar storage,calendar synnc adapter, contacts storage, contacts sync adapter , download manager , Gmail , Google+ , maps , market , talk , (do clear data on all !! )
5. go to setting/account & sync , DISABLE auto sync ..
6. reboot phone
7. on this cassue , i recommend u to make a new google account or use another account .. so...