Most smartphone cases are quite bulky creations that often do nothing more than protect your device. That might be all you want, but if you’re after something extra, then the Safe Wallet may be the case for you. Its flip-open back cover allows users to place up to five credit cards or 15 standard-size business cards inside it. You can choose to fill the wallet space with other items, such as coins or keys, too. Price: £40 • You may also like the latest impossibly slim waterproof sony xperia z3 compact android tablet.