The American version has a locked Unicom Apple 4s mobile phone. Will the contract be unlocked immediately after it expires?

The contract expires and will not be unlocked. The American version and other foreign versions of the iPhone generally have locks, which are called network locks. If there is a lock, you need to stick a card (the card needs to correspond to the system version, for example, the original 6.0 version of the card can not be used after upgrading to 7.0). The principle of sticking a card is actually to disguise the signals of domestic operators as those of foreign operators and be recognized by mobile phones. Therefore, if you want to use the Internet function, you must turn on cellular data, 3G function and data roaming at the same time. I suggest you try to modify the settings and see if they can be used. (In addition, it should be reminded that there is a built-in card sticker on the market, which sells the locked machine as an unlocked machine. If conditions permit, I suggest you check it and simply judge whether you need to open the above items before surfing the Internet. There is no need to unlock the version. ).

These foreign operators will have network locks in custom machine, and there are two ways to use them in China: unlocking and pasting. Unlocking is divided into official unlocking and software unlocking. There is no difference between the official solution and the normal authorized use of mobile phones, while the soft solution is to crack the permissions of mobile phones by software, which can not be guaranteed to be completely cracked at present, that is, there may be some defects in use. Card stickers are for unlocking mobile phones. By sticking a card on the number card, the signals of domestic operators are disguised as those of foreign operators and recognized by mobile phones, so as to achieve the purpose of use. However, this method has compatibility requirements for mobile phone systems, card stickers and operator number types. For example, the card sticker of ios6.0 cannot be used after the system is upgraded to 7.0, and a new version of the card sticker needs to be developed. The initial card can only support 2G function.