iD Mobile is a network provider for mobile phones which uses the 3 network and is part of the Carphone Warehouse. They serve the whole of the British Isles, that is both the UK and the Republic of Ireland.
Numbers with an 01 in front of them are called geographical numbers – and you can buy 01 numbers here – meaning that they are numbers specific to an area of the UK. These are charged on mobiles like those which use iD Mobile at a rate between 3p to 55p per minute. The prices may be more if calling from abroad. Please check with your provider for more details, note that this range can only be approximate.
If you have problems with call charges please contact Ofcom and they will be able to assist you