Second, the US version of iPhone5S (Verizon): This version is customized by Verizon, an American operator. There is no lock in this version, and it is said that the official promised never to lock it. The highlight is that you can use mobile, Unicom and telecom mobile phone cards, the so-called "three netcom", which is simply the best. The only drawback is that there is no warranty in China. It seems a bit troublesome to spend money on maintenance because it supports many networks and has different hardware. You can't just find someone who can repair Apple's mobile phone. Generally, it is best to repair it to the seller, otherwise the more you repair it, the more problems you will have.
Sprint: This version can only use mobile and Unicom cards, but Unicom may be locked in the future, which is really uncomfortable. Therefore, it is not recommended to buy, and it cannot be guaranteed in China, but only by the merchant.
IPhone5S us version (at & amp； T): Unicom and mobile phone cards can be used normally in this version, but there are two situations in this version:
1. The mobile phone cannot be activated. It is said that the last four digits of the credit card should be used, so that the first person who buys this machine by credit card can unlock it.
2. The mobile phone is locked, and the merchant says it can be solved, which is very troublesome anyway. Who can guarantee that it will not be locked again after unlocking? This country can't guarantee it, only the store can guarantee it.