Why do I text, call or do other things? How do others know?

Why do you text, call or do other things? How can anyone know? It is impossible to tell the truth in this situation, because after all, it is your own phone, make a phone call, send a WeChat or text message, or do something that others can't know. If others know, then this other person must be very close to you. And someone close to you may know, because he probably downloaded some software from your mobile phone. So no matter what you do, whether you call to send WeChat or do something else, others will know. You downloaded a software in your mobile phone, and it can directly connect to your mobile phone software through your mobile phone. Then he will know everything you have done.