Mobile phones can't send short messages and QQ messages. What should I do?

You can find out in the following ways:

1. First, check whether the mobile phone has a signal. If the signal is bad or there is no signal, the mobile phone can't register with the mobile network, and the SMS function and data function can't be used. At this time, you just need to go to a place with good signal to get back to normal.

2. If the cell phone signal is normal, check whether the cell phone is turned off in arrears. If the phone is turned off due to arrears, it can return to normal after paying the phone bill.

3. If the above two points are normal, it is necessary to consider the failure of the mobile phone and send it to the mobile phone repair point for testing.