How is it that Samsung a5 mobile phone automatically sends 702 to Telecom?

Samsung a5 mobile phone automatically sends 702 to Telecom. This problem may be related to software. It is recommended to try the operation according to the following steps:

1. Restart the phone.

2. Check whether the mobile phone has downloaded the latest third-party software (SMS management, free games, software, etc.). ). It may be that the software sends text messages automatically. I suggest you try to uninstall it.

3. If it is not solved, it may be related to the SIM card binding service, and you can consult the network operator to solve it.

4. If it is invalid, back up the data and restore the mobile phone to the factory settings.