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Many thanks for this though clearly I should have checked I am shocked that this phone is not compatible as my daughter's iPhone 5 with EE is and therein lies my mistake.
As it happens 4G is not available in the Blackpool area and it was only on our recent visit to Manchester we noticed my wife and younger daughter's phones did not receive a 4G signal where as my 5C did. They will return to 3G.
Thanks for your reply and indeed all the replies received from this very helpful community og Giffgaff