Why can't Meizu 3 send SMS, Unicom's?

If the user fails to send a reminder when using the mobile phone, it is usually caused by the following reasons.

SIM card SMS center number has been changed.

Mobile phone arrears

Network communication failed.

Operator problem

You can try to solve it in the following ways.

First try to restart the machine;

Enter the SMS interface:

SMS-Settings-SMS Center-Default Local Center Number

Select the default option directly and the default SMS center number will be reset. The format of SMS center number is "+86 138****500".

The middle four digits are the local area code, and less than four digits start with 0. (For example, Shanghai 002 1) Add a+sign before the number and add a+sign yourself (just press "0" for a long time).