M2M Mobile has come up with "Android Sip Client (VoIP)" for Android based Mobile phones.M2M Mobile lets the callers make VoIP calls through their standard Mobile phones. The Android dialer works just like standard SIP Softphones i.e. it gets registered on the SIP server and then let the authentic caller makes calls. The biggest advantage that this Android dialer provides is the huge base of potential customers who can now make calls using their standard mobile phones. The mobile phones need to be connected to the internet either through Wi‐Fi/3G.