Bewip is the best sofphone
mobile for VoIP. BeWip support all SIP architecture as asterisk, openser,
mitel, alcatel, cisco, MOCS, OCS from Microsoft, centile. BeWip is available
for windows mobile device (HTC HD, HTC DIAMOND, HTC VIVA, HTC TYTNII, HTC
TOUCH, HTC Cruise, HTC S710, HTC S630, HTC ORANGE, HTC SFR, HTC BOUYGUES and
iphone.