I already installed viber, and my friend had viber in his phone as well. However I cannot call him via viber, and I saw a notification: "This contact does not yet have viber. Press Continue to place a regular call through your carrier. To place a free viber call, this contact must also have Viber installed." But my contact has viber already and we've been using viber for several months already. I have tried deactivating and reactivating my account. I was able to receive SMS also for the new viber code. I have tried uninstalling viber and then re-installing it. But still, the same messages are coming.
Please help me solve me this problem. I am looking forward to hearing from you soon.
Thank you very much