Dixons-owned company says names, passwords, dates of birth and credit card information have spilled out.
With low cost 4G, contract flexibility and wide-spread free roaming Carphone's new iD network is looking to shake things up.
Carphone Warehouse has been selling contracts for other vendors for years. Now it reportedly wants in on the action.
Carphone Warehouse is touting the ancient iPhone 4 for only 56p a day over two years, but is it really good value for money?
American tech retailer Best Buy has called time on its European expansion and is selling out to partner Carphone Warehouse