As well as selling electrical items and phones, the retail group of Currys PC World and Carphone Warehouse is intent on boosting its technology support. Team Knowhow has been rolled out to more than 1,000 stores and this site lets you book a repair. Its step-by-step process is intuitive: choose the kit and see the price. You can only book by phone, although you can track repairs on the site and get a sense of what they involve. More impressive are the free kit guides looking at setting up gadgets, cleaning them and other tips. There’s also info on support plans, trade-ins and insurance, all wrapped in a cheery design.