Push Notifications for iPhone - How to enable
What are push notifications?:
Push notification (for iPhone) allows Viber to notify you of any calls (incoming, missed, etc.) even when Viber is off or in the background. It will also notify you of friends that just joined Viber. When setting Viber up in your iPhone, and you get a message requesting push notifications, tap on ‘OK’ to enable the feature. Please note that Viber will not work if this feature is disabled.
How to enable your push notifications:
Step 1. In your iPhone please go to your device settings
then Notifications -> Viber
Step 2. Turn Notification Center ON (not applicable in pre IOS 5)
Under Alert style, choose either Banners or Alerts.
Step 3. Badge App Icon, Sounds, and View in Lock Screen
should all be set to ON.
Now reboot your phone (turn it off and then back on).
If all is according to the above settings, but you still receive a push notification error, and you are not using a jailbroken device, please open a support ticket.