We are looking for a sip softphone which can run on Android

Requirements:
User friendly interface
Branding design
Support SIP signaling
Supports G711,GSM,G729,G723.1 codecs
Can run behind NAT
Support Ethernet,GPRS,EDGE,WiFi,3G
Work with any softswitch by using SIP.
Support for tunneling

Softphone features:
Dial, Hang up, Redial
Phonebook
Call Mute
Speaker Phone
Call History
Account Setup


Thank you