The mobile phone will send text messages by itself? !

Either the cottage itself is loaded with a large number of software charged by third parties. It is estimated that you accidentally pressed something, and then it is equivalent to opening this business. It is suggested to contact China Mobile or China Unicom and ask them to check the opened services for you and cancel them on the spot.

If it is a smart phone, it may be that your phone is poisoned.

If the Nokia phone works, enter *#7370# in standby mode, and then the password is 12345. Try to restore the factory settings of other phones. ...