X-PRO for Pocket PC has been rebuilt and redesigned. Use X-PRO for Pocket PC on GSM/WiFi - Dual Mode devices to roll out VoIP Mobility! WiFi, 3G/UMTS, EV-DO, EV-DV, EDGE and other ubiquitous IP networks will be used to power VoIP Mobility. Xten's X-PRO v2.2 is the first choice in 3rd party SIP softphones for the Desktop and is quickly gaining momentum on mobile devices.

X-PRO for Pocket PC features that:

Acoustic Echo Cancellation

Short Message Service

Intelligent NAT Traversal

SIP MD5 Authentication

Support for Multiple SIP Accounts [4]