I bought an iPhone from my hands. Doesn't connect to iTunes

Question

iPhone

During activation, the iPhone is not recognized through the computer.
Via Wi-Fi, it says that the server is temporarily unavailable.
Even after resetting all settings
, I have everything clean. Purchased allegedly in the USA, unlock and all things.
Who faced this, what could be the problem?
UPD
IMEI Information
Model: iPhone 5S SILVER 32GB-USA
IMEI: 013886001667846
Serial Number: DNPLKMG7FFFK
ICCID: 89014103276630005814
WiFi MAC Address: F8279353E74E
Bluetooth MAC Address: F8:27:93:53:E7:4F
Purchased in Country: United States
iOS Version : iOS.X
Activated: Yes
First activation
date: 12/07/13 Last activation date: 12/07/13
Warranty Repair and Service: Limited Warranty
Started: 11/05/13
Ends: 11/04/14
Find my iPhone: Activated
Operator: Unlock
SIM lock status: Unlocked

Answer 1

Bought in vain, try to return it!

Answer 2

iphone your chinese

Answer 3

Everything is fine with your iPhone, i.e. it is not blocked by Apple and is not blacklisted, i.e. not stolen.
Try to get help on apple.com

Answer 4

Contact the Apple service center, what can I say, but it was better to do it before buying, they came, paid 500 rubles, they will check everything and issue a conclusion
here, for example apple4you.ru/servisny_centr