Voicecall Plus

Voicecall Plus dialer is a mobile app for Android. The Voice Call dialer
helps users make international calls easier from an Android phone. The
application is free to download.

After downloading and installing the Voicecall Plus dialer, open the
application and follow the simple wizard to set-up the Voicecall Plus
dialer:
VoIP Calls via Wifi, 3G / 4G, edge or UMTS.

You will just need to select the Contact you want to call or enter the
number manually in the DialPad. The Voice Call dialer will take it
from here.