Hello, I have noticed a problem with Viber application. It crashes after 5 minutes or more during a call, i am using WiFi network to use Viber but it always crashes after 5-6 minutes. Also, sometimes it says "Not enough memory" when i am trying to send pictures through viber to other users. Then i have to restart my phone and the picture goes smoothly. I am using Advanced Task Killer app but i dont know why it still gives such errors of not enough memory. Pease help!