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					Originally Posted by  Keighleyboy
					 
				 
				With Isle of Man SIMs being UK based numbers has anyone actually tried moving your own number to another UK based mobile network? 
 
For example moving a GT-SIM number to someone like O2-UK 
			
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 I'd say there's no chance at all.  These are Manx Telecom numbers, regulated in the Isle of Man.  There isn't even number portability between local operators yet  here (i.e. MT to C&W), at least last time I checked.
Which is a pity, as I had a nice memorable GT-sim number.
(easyroam beat me to it while I was checking the C&W site - no mention of porting numbers there).