Hi. My LG Esteem keeps randomly shutting off and then being tempermental in turning back on. it also is having connectivity. issues with my Bluetooth headset. I have to turn off my Bluetooth. on my phone then turn it back on again before I can make a call on my headset. My son thinks I may have a virus. How do I tell if that is the case? Also, is there any virus protection out there to prevent harm to my phone?