Having the same issue here. and viber out sometimes rings on the first outbound attempt but subsequent attempts it wont ring until I hang up the call, and then it starts ringing, but there is no option to end the call other than a forced shutdown. on Viber free and also Video call it is the same issue, although I verified that the video call can be answered. Ive got nearly $20 on my viber out account, with auto replenish. I've cleared the cache, uninstalled and reinstalled the application now 4 times. still no ringing on outgoing calls, and I have to manually kill in application manager on Viber out calls. Should I create a new post?