Rapid overheating of the smartphone, noise and echo during calls may be signs of wiretapping.
Increased consumption of mobile traffic and rapid discharge may also indicate that some processes are constantly running in the background.
Unusual behavior of the smartphone will indicate that data may be leaking to attackers, Anton Nemkin, a member of the State Duma Committee on Information Policy, told RIA Novosti .

He explained that the first thing to pay attention to is overheating of the phone, strange noises and echo during calls.
These signs, as well as a quick discharge, may indicate that the battery is being wiretapped.
The deputy recommended checking the use of mobile data for increased consumption of mobile traffic.
Spyware programs typically transmit information over the Internet, which dramatically increases mobile traffic.
Nemkin advised looking at data usage statistics for several months.
A sharp increase in traffic may be a sign of spyware at work.