I can't send a text message, but I'm prompted what the error code -1 is. I can't ask the master to answer it and restore the factory settings.

If the mobile phone can't send short messages, you can troubleshoot according to the following situations:

Case 1: The number of the short message center is set incorrectly, please reset the correct number of the short message center.

1. The setting path is different for different mobile phone models. It is recommended to check the mobile phone instruction manual.

2. The number of short message center is different with different mobile phone numbers. For example, the number of Shanghai Unicom SMS Center is +861313145, and the number of Beijing Unicom SMS Center is +861311125.

in case 2, there is no signal or the signal is poor, so you can go to a place with strong signal for testing.

in case 3, the short message sending function is turned off, so you can turn on the short message function and try again.

case 4 is blacklisted by SMS, and it can be used normally only after going to the business hall to remove the blacklist status.

the balance of number five is insufficient, so you can pay and recharge and try again.

in case 6, there is something wrong with the mobile phone, so it can be tested by changing the phone.

after the above reasons are eliminated, it still cannot be used normally. You can click /qAHfS for feedback, and we will check and handle it as soon as possible.