From Carphone Warehouse ...
Please select Credit Checking ID Requirements Order Acceptance
In order to obtain a mobile phone contract, you need to be at least 18 years old. You must also pass a credit check. If you have a low credit rating, we may ask you to pay an initial deposit when purchasing your contract, which your service provider will refund to you after an initial period.
To purchase a contract in one of our stores, we need to verify your identity. We need one proof of signature, such as a debit card, credit card or passport, and one separate proof of address, such as a driving license or bank statement.
If you are in store, and have a chip and PIN enabled debit or credit card, the sales rep can accept this as both address and signature proof. However, you MUST know your PIN number and the billing address for the card must be identical to the billing address you have given for the phone contract.
If you purchase your mobile phone through our website or our direct sales team over the phone, a valid credit or debit card is sufficient.
"