U-Mobile Ultra app for iPhone and iPad

U-Mobile is a mobile dialer application which makes VoIP calls with minimum iOS version support of 3.2 on Apple iPhone, iPad, iPod and it uses the 3G/Edge/wifi Internet connectivity.
U-Mobile is developed based on the requirements of VoIP Providers business needs.

Features :-

U-Mobile uses SIP protocol to handle the outgoingcalls.
U-Mobile run Behind NAT or private IP.
User Friendly Interface.
Auto Sync of Balance.
Real Time Sip status messages.
Call History.
Loud Speaker.
Address book integration.
Compatible with all sip standard switches.