Iservices

Iservices Plus is a VoIP client for Android. It works over Wi-Fi, 3G or LTE. Support for high quality g729, g722 and Opus codecs.
Iservices Plus trough mechanism delivers VoIP services even in blocked areas.

Main features:
* Making and receiving VoIP calls
* Integrated contacts from the phone
* Loudspeaker
* Favourites
* Recent calls
* Support for codecs g.729, Opus, GSM, g.722 and g.711, AMR-NB, AMR-WB

Note for operators:
If you are interested in rapid roll-out of mobile VoIP services please contact us to enable Iservices Plus service for your customers.
Major mobile platforms available.
you can use that.