Integrated dialer with elastic calling

An electronic communications system comprising:

• a mobile network to provide communications for a plurality of mobile communications devices over a wide-area IP network via respective first data channels, wherein mobile directory numbers are associated with the plurality of mobile communications devices, and wherein at least one mobile device of the plurality of mobile devices comprises an integrated dialer and a native dialer;
• a wireless local-area network (WLAN) to provide communications between a plurality of communications devices over the wide-area IP network via respective second data channels, wherein the plurality of communications devices includes the plurality of mobile communications devices;
• a Voice over Internet Protocol (VoIP) service coupled to the mobile network and the WLAN via the wide-area IP network, wherein the plurality of communications devices are associated with VoIP telephone numbers;
• a public switched telephone network (PSTN) to provide communications between the plurality of communications devices via respective voice channels, the PSTN coupled to the VoIP service;
• and
• a communications routing system coupled to the plurality of communications devices and coupled to the VoIP service, the communications routing system configured to cooperate with the integrated dialer of the at least one mobile device to route, at the at least one mobile device, a voice call over a designated channel, the designated channel selected from:
• a first data channel of the mobile network, a second data channel of the WLAN, and a voice channel of the PSTN.