Why does my mobile phone send a text message to another mobile phone as soon as it is plugged in? The mobile phone that sent this message is using your mobile phone. . . How to solve it?

Your mobile phone may have security software and anti-theft function installed. If this is your mobile phone, set it yourself. If you just bought it, you may have bought black goods! If you want to continue to use it, you can find this software in the application management, usually 360 or similar security software. Just uninstall!