Rs 15 deducted from mobile phone balance, everytime user will answer smartphone

Indicating the high levels of hacking of smartphones, the domain investor is finding that Rs 15 is deducted from the Vi balance everytime she answers the smartphone, after there is a call.
They are claiming that it is for a sports pack.
This smartphone is not used for receiving calls, so the domain investor removes the sim card everytime there is an incoming phone call.