[GadgetKen]

Another thought on inexpensive calling from Bermuda to other countries, the international call back sim Hop Mobile could be used with Callback World or other callback service to trigger a callback. Cost would be the outbound trigger call or SMS plus 35 cents a minute inbound from Hop for the return call plus the callback service cost per minute. Hop is pretty expensive for outbound at 95 cents a minute, so this would likely be the most logical solution with them.
A local sim (Telecom Bermuda or Digicel)and/or local prepaid calling card would likely be the easiest and cheapest, but just a thought on another wireless solution....