Hot on the heels of GeoSIM, which is expected to launch its dual IMSI SIM card very soon, we now hear that Camel Wireless is getting ready to do something very similar. Dual IMSI SIM cards can have two mobile numbers allocated to them – in this case it’s a UK and a USA number – which makes them particularly useful for trans-Atlantic travellers because calls in either country (and a few others) can be received free of charge. GeoSIM promises a launch this month; Camel Wireless says it’ll start delivering its SIMs in May. [Press release via RealWire.com]