Hey guys! please give minute to help me out.guys I bought a 7( 2015) before some day since that day I am not getting 3g connectivity, I cant access 3g internet speed.its not supporting at all.i have 3g sim 3g pack as well instead its not supporting even 3g network doesnot come.i went to service centre they told me to buy a proper nano sim I bought it still its not supporting please guys help me out.