If you are going to purchase Samsung galaxy note 3 then 12 major problems that can occured.So better first look it
1.Slow charging
2.Phone reboots on its own
3.Overheating
4.Wifi problem
5.Battery drains faster
6.Sometimes screen go black
7.Disappearing photos
8.Unreliable GPS
9.Call drops sometimes
10.And one bug email does not sync
11.Phantom notifications
12.Index service can stopped