It is possible to utilize Voip services and pay your monthly bill using Bitcoin and Other crypto currencies.
To do that you must follow the below steps:-
1- Signup as a buyer on TelexomsXChange.com.
2- Once you have received your Access details go to http://www.telecomsxchange.com/bitcoin to top up your account and start using it.
At start the supported crypto is BTC and Ripple, other currencies will be added upon request.