What if Apple 7 plus can't send a message?

Reasons for not sending short messages: network settings, cut SIM card, wrong number of information center.

Method 1, turn on the mobile phone settings, and then turn on the switch for sending and receiving SMS again;

Method 2: Enter the restore point to restore the network settings;

Method 3, enter the network and start data roaming;

Method 4: open the dialing interface of mobile phone, enter * 5005 * 7672 *+8613800abc500 #, where ABC is the local area number (for example, 755 in Shenzhen), and then press the dial key. +Yes, press and hold the 0 key.