I have used Carphone Warehouse for my contract and upgrades for many years. In March they offered me a deal which included a bonus of a £300 cheque in exchange for a two-year contract renewal, which I was happy to take. However, despite my having contacted them on several occasions over the last few months, they have failed to send me the cheque as agreed, leaving me with no option but to take them to court. I strongly suspect this is not an error, but a deliberate ploy to conserve cash resources, as they are struggling financially. I wouldn't recommend them to customers or investors.