Only download apps from the or Apple App Store .
If you are worried that someone has installed such a program on your device, look for these : skachat besplatno programmu proslushka telefona
: The phone gets hot or loses charge unusually fast. Only download apps from the or Apple App Store
: Spying apps constantly upload your data to a remote server. steal SMS logs
: Apps hidden as system updates or "free" utilities that secretly record audio, steal SMS logs, and track GPS. How to Protect Your Own Phone