I was offered £135 to trade in my Samsung Galaxy S9. Once my new phone arrived, I packaged it up and sent it off. The S9 was in perfect working order and I was using it without issue right up until this point. A couple of weeks later, I received an email from Carphone Warehouse telling me that they could only offer £35 as the phone didn't work due to water damage. Firstly, let's remember I'd been using the phone without issue right up until sending it so it was definitely in working order. Secondly, the S9 is a water resistant device so it's very unlikely that it could be water damaged unless something serious happened while the phone was in their care. From reading other reviews about the trade-in service, I can now see that claiming false damage is a very common occurrence and I deeply regret trading my phone in. Absolutely avoid!