What to look out for when buying a used iphone?

1, first to check the phone serial number, whether gray goods or goods iPhone serial number can be found, if not found, there may be a refurbished machine or shanzhai machine.
Check to see if the camera is working, the volume of the speakers, and the volume of the calls.
3. Check the wi-fi of second-hand iPhone. Go to the place with wireless network to check whether the wi-fi can work properly.
4, the battery power should also be measured, if the phone is on the percentage of power, it is best, if not open, enter the phone Settings to turn on the percentage of power, to see how much power after the test, under normal circumstances, an hour of power loss of about 10% is normal, too much may be a problem with the battery.
5. You also need to log out the Apple ID of the current user. If you do not log out, you will not be able to use it when you need the login account password.
6, a point of advice, the purchase of second-hand mobile phone is not to buy refurbished machine, to pay attention to the difference between the two, if it is apple’s official refurbished machine is better, if it is a third party black workshop refurbished machine is miserable, should pay special attention to it.
7, as for the second-hand version of the iPhone, in fact, the performance is about the same, but the version of the same warranty, gray goods can not guarantee, so it is still recommended to buy goods products.
8, if you do not know much about the second-hand apple phone, it is recommended to look at the formal business and some BBS science posts, from the above to understand some of the knowledge of this aspect, do not know what to go to the second-hand market. In addition, buying a used iPhone should also pay attention to the problem of locked version and unlocked version, the locked version of the iPhone can only use the SIM card specified by the phone operator. If you want to use a SIM card from another phone company, you have to unlock the iPhone. An unlocked iPhone is a SIM card that can be used from any carrier.If you want to buy used iPhones, you can choose a second-hand sales platform, energyitshop.com is a professional global sales of Apple mobile phone platform´╝ü