Viber service unavailable, being blocked and down for maintenance

I am having problems connecting to Viber today and when trying to call my contacts for free, it says Viber service unavailable or being blocked. I thought it was just me or my connection, but some of my friends and relatives started asking me if I having the same issue. So that confirms me that I am not alone.

For the benefit of those who are not familiar with Viber. Viber is an mobile application that lets you use your Blackberry, Windows Phone, Nokia, Bada, Android Phone and iPhone to make free calls and send free text and photo messages to other Viber users, on any device, network and country!
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