Truphone, known more for enabling WiFi calling and SMS on Nokia handsets than being a traditional wireless carrier, is now going to be just that. Truphone recently announced they have acquired the assets of SIM4travel, a UK-based mobile virtual network operator. SIM4travel is very similar to Pat Phelan's Roam4Free service which substantially cuts your mobile roaming rates.

Prior to this acquisition, the only thing Truphone didn't have was the ability to make calls over GSM natively. They already did SMS-a major step along the way to being a mobile phone operator-and of course they operate on mobile phones, albeit Nokia ones over WiFi. It's the first carrier I am aware of that will support GSM and WiFi using SIP.

I can't wait to get my Truphone branded SIM :)