Grandstream Wave is a FREE softphone app that allows users to make and receive voice calls through up to 6 different business or residential SIP accounts on any Android™ device from anywhere in the world.
Telephony Features :
Hold, transfer, forward (unconditional/no-answer/busy), call park/pickup, 6-way audio conference, paging, DND, shared-call-appearance (SCA) / bridged-line-appearance (BLA), BLF, downloadable phone book, call waiting, Voicemail with MWI, flexible dial plan, personalized music ringtones, server redundancy & fail-over, BLF.
Mobile Device Integration :
Supports background mode, proximity sensor for in-call touch screen and keys lock, auto rotation, GPS location based call forward (pending)