Grandstream Wave is a FREE softphone application 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.
Supports G.711µ/a, G.722 (HD-audio), G.726-32, G.729, GSM, iLBC, Opus and Speex codecs
Security features include SIP over TLS and 128/256-bit SRTP
Up to 6-way audio conference, and 24 virtual BLF keys
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