Recommended by poster below. Used them yesterday...excellent...fully recommend..contact Steve
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I've used a great company based in Aylesbury a couple of times called CellServ. They come out to you. I'm sure they can advise how to hook up your phone and do a good job.
Google gives them at:
19 Isis Close, Aylesbury, HP21 9LY, UK - 07768 746477, 01296 584316