One of the biggest issues that was supposedly dealt with is that if you install viber on your phone, it works great, but if you were then to install viber on your tablet, then you would have the issue of when you went back to your phone the account is no longer available, so when you now activate the account again on your phone, it get deactivated on the tablet, this is not the same for windows and mac as these will work together with the application on your phone...... Viber please get your act together you said we could do it but we cant.