1.Not a true volte phone
2.you can not download songs, movie and something else if you want to download songs then you have to purchase song
3.you can only pair on with apple device through bluetooth any other device cant be paired with bluetooth
4.screen size is small 4 inch if you want to watch movies in phone then dont buy this
5.you cant play hack games because games can only be download through app store
6.you can not insert memory card in it
7.internal storage is low only 16gb
8.ram is also low only 1gb
9.sometime you need to update app otherwise it may not work
10.otg support but otg is very expensive
11.front camera quality is good but not good like 6s
12.not so many features in it
13.you may have to jailbreak if you want to customize your phone but it is risky
14.one feature is that its sound and security is good
15.in this range there are many other smartphone with to many features in them