Iphone4s American version, Unicom card, after upgrading to 7.04, you can't send text messages, your mobile phone can't access the Internet, and your address book is American standard. Ask the master t

Iphone4s American version, Unicom card, after upgrading to 7.04, you can't send text messages, your mobile phone can't access the Internet, and your address book is American standard. Ask the master to help me solve it! The American version and other foreign versions of iPhone can be divided into locked version and unlocked version. The unlocked version can be directly inserted and used, and the locked version needs to be pasted. However, the card needs the corresponding system version. For example, the original 4.0 version of the card can not be used after upgrading to 5.0.

If you have a locked mobile phone, you may need a card that matches your mobile phone system to use Unicom's mobile phone card. However, not all mobile phone card stickers can match the network of domestic operators.

If you have an unlocked mobile phone, I suggest you change your mobile phone to test your Unicom card. If it doesn't work, there is something wrong with your mobile phone card. If card cutting is used, the mobile phone card may be damaged. In this case, it is recommended that you bring your valid certificate to Unicom's own business hall to change your card. If your mobile phone card can be used normally, it does not rule out the problem of your mobile phone network settings. It is recommended that you restore the mobile phone network settings or consult the after-sales staff of the mobile phone. In addition, you need your mobile phone to support Unicom's network standard and network frequency before you can use it, and it does not rule out that you need to jailbreak to use it.

If your mobile phone can't send SMS at present, we suggest you set your SMS center number: