Android softphone

MizuDroid is free a SIP based softphone for Android phones which you can use to connect to any VoIP server or PBX. Features include all common softphone features (call forward, transfer, conference) and high quality audio codec such as G.729 or wideband. The calls are with crystal clear voice quality even over a 3G network, likewise for a WLAN connection. Free download from Android market or Apple appstore.