any expected guidelines for update...want to hide app tray icon...

today i have update a patch of 348mb on my s7 and after updation my mail account mails specially sent mails are not getting properly sync....sent item shows that there are 92 mails in sent item but actually showing only 7 mails.....i have allready bo...

is samsung s7 hardware compatible for Samsung new 8.1 user interface...

will s7 will get s8 interface experience...