I run a charter boat in the British Virgin Islands. We get internet on board from a local company "CCT BOATPHONE" via a pcmcia card. Its a merlin v620 cdma card. This card is installed into a top global 3g phoebus router. We access the router via wifi. The system is quite reasonable, pretty fast and reliable. We have however on 2 separate occasions had problems with connecting to it. On board we have 2 laptops running xp, 1 running vista, 2 macs, and 2 iphones. When the problem occurs the xp's connect to the router and internet, no problems. The iphones connect also. Both the vista and the macs cannot connect at all. Now if we move the boat to another location IE change cell towers, everything is back to normal. I figure it must be a problem with my provider, I visited them today and talked to one of there techs and they said they could not see what could possibly cause it. Any ideas, Should I still be looking at my provider or maybe my router. I do not be leave its my router as each time cruising to the next bay was an instant fix, The only thing that changed was we would be out of view of the previous tower and now on another. Any help would be appreciated. Bazza.