IPhone5 ios7.0.2 system can't set the SMS service center number.

If you can only receive short messages but not send them, please follow the following steps to troubleshoot:

1, you can use the internal command to query and edit the SMS center number:

Set SMS center number: dial *5005*7672*+86 SMS center number # with iPhone;

Delete SMS center number: dial ##5005*7672# with iPhone.

Inquire about the set SMS center number: dial *#5005*7672# with iPhone.

When using the internal command, first use the delete command, and then set the SMS center number.

Note: The number of the set SMS center is generally +86 130 1 * * * (local area code is 4) 500. For example, the correct number setting method of Hunan Changsha Unicom is * 5005 * 7672 *+86 13065438.

2. Please consult the wireless operator to check whether your SIM card status is normal.

3. Be sure to click on the text input field at the bottom of the screen to bring up the keyboard. Before you start typing, the "Send" button is always displayed in gray. After you enter the text, the "Send" button is displayed in bright color and can be clicked.

4. If you can't click Send after entering the text, the "Send" button is still gray. Please set > SMS > turn off the display of the subject bar.

5. If you try to send a short message to multiple recipients, and you manually enter each number instead of using the address book list, make sure to separate each number by pressing a line break instead of a space.