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| ...I went on their website but couldn't discover what you were suggesting... | |
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The Channel Islands use a specific prefix within the +44 range, i.e. most people would think it's a normal UK number, but it's not.
see
here:
+44-74184 is associated to Isle of Man (as are some more prefixes)
+44-7509... is Jersey (as are some more prefixes)
+44-7781... is Guernsey (as are some more prefixes)
I guess 99.9% people think that +44-7.... is automatically a UK mobile charged at UK rates, but that's not the case.
three.co.uk is just one random "usual" UK provider, but they happen to include the channel islands as one of their "roam like home" destinations. As such your dad could get himself a "usual" UK number via this provider, and all your calls would then be included in a flatrate, as long as it includes the UK (but not the channel islands).
I'm not sure if a three.co.uk number can be used indefinitely outside of the UK without ever incurring a surcharge, but I've been using a three card in Switzerland for several years by now and they never charged anything extra, so this might as well work in the Channel Islands.
As such your dad would switch his Jersey (+44-7509...) number for a "usual" UK number.
If he wants to stick to his current number, why not give him a new dual sim phone together with a "three" card? Like this he could have two numbers (one Jersey one "normal" UK number) in one phone.
See also:
http://www.three.co.uk/support/roami...l-islands#payg