Cubic Mobile is a dual-band GSM/Wi-Fi phone that includes, MAXroam, a "universal" SIM that supposedly offers the best country-to-country phone rates. User receive a single number but can create up to 50 local numbers, which are forwarded to the Cubic Mobile or a MAXroam-enabled device.
VoIP calls are free within the Cubic network. A basic model will retail for $135 and a Windows Mobile version is priced at $219. Both will be available October 1, according to the company, and the SIM card work with almost any phone (no Blackberry).