➢ Unfamiliar applications are being downloaded on the phone.
➢ There is a faster than usual draining of phone battery.
➢ Phone turning hot may be a sign of someone spying by running a spyware in the background.
➢ An unusual surge in the amount of data consumption can sometimes be a sign that a spyware is running in the background.
➢ Spyware apps might sometimes interfere with a phone’s shutdown process so that the device fails to turn off properly or takes an unusually long time to do so.
➢ Note that text messages can be used by spyware and malware to send and receive data.
Source: Reserve Bank of India.