Ways to eliminate listening?

Question

mobile connection

We installed wiretapping on the phone, without having access to the device, i.e. remotely. Geolocation, calls, messages, browser history - everything is included. I searched the net, there are a lot of such software, especially in Asia.
All this is very unpleasant, and very annoying.
Two questions:
1) If wiretapping is already on the phone, how can you get rid of it?
2) If there are spying applications on the network, then there are probably AntiSpy applications. Found in google play, but only zero from them.
Please advise how to solve this problem. Without resorting to the help of the state. structures. (because this is an extreme option), and you can’t write a statement for everyone.

Answer 1

The most reliable option is to flash the phone in an official way without saving data. If the phone had already been in the right hands, then anything could be integrated there so that you would never find it, and even a factory reset would not help you.
Just keep in mind that the operator listens and records all your conversations and nothing can be done about it.

Answer 2

If you are sure of this fact, do not use this device again, and the subscriber number too.