Ok here goes,I bought a Note from Gumtree 2 weeks ago really cheap guy said it was locked to Three which is why it was so cheap,seemed okay when I bought it but when i got it home the problems started would not charge kept saying it was charging even when not connected.As the days went on the problems got worse.Eventually I contacted Samsung and two days later received a jiffy bag.Sent it away last Thursday got it back the following Tuesday working perfectly and now unlocked to all networks.So beware of who you buy from and a Big thanks to Samsung.