Okay...here is a way around it although it will cost you a bit....go to
www.localphone.com....for $3 plus $0.99 (US funds although you can get UK funding), they will provide a US number....you can then set it up to forward to your isle of man number. They charge you 25¢/minute for these calls.....but most of the UK providers, well T Mo and Orange tie in with yourcallworld and can call the US number for 3p/minute while Vodafone, after a text message joining their cheap international plan is free charges 5p/minute to call USA numbers! Sure beats £1.50/minute for them but it costs you a tad!