When will the new tanks of the 7th grade?
Tier 7 release is what your referring to? Not soon if at all. Most likely they will release T6 S levels first or more techs, patterns, or decals, like the new After Glow coming out with the next update this month.
Link your game to your Game Center account to save your game progress. Bring your progress with you if you switch devices.
Try these steps first to clear up any problems you may have when connecting to an EA game.
Reset, update, or link your account information.