At the Mobile Phone Kingdom UK we provide the best mobile phone deals on unlocked used Blackberry smart phones including models ranging from the Blackberry 8100 Pearl, 8800 or the 8820 smart phone with incorporated Wi-Fi to some of the cheapest Blackberry mobile phones around like the 7290, 7100 and 7130. Our Blackberry selection are all unlocked mobile phones which will work with contract or pay as you go sim cards. If you are looking for a 3G Blackberry which will work with three (3) network sim cards or with a 3G sim card then the 8707 is a great choice of phone.