Brought a Samsung GALAXY S4 for £105 in May 2018, hardly used the phone as it was for work. in August 2018 the phone then stated out of the blue that it had no sim. the sim card was in place and hadn't been touched. I took the phone back to the CEX shop in Guildford Surrey where i purchased it as it had a 24 month warranty. They took the phone and sent me away for 40 minutes while they checked it. When i came back they said the warranty was void as there was a tiny crack in the rear external case of the phone. I explained that this has nothing to do with the Sim card not registering and then they showed me some bent pins where the sim card goes and said that i have bent the pins and that is why it doesn't work. I was furious as i had not bent the pins, I hadn't touched the sim card - why would I? Anyway the store manager basically called me a liar and said the phone will not be covered as it is accidental damage. there is no customer service phone number to contact CEX, i will never use this company again, this is the one and only experience that i have had with them.