So, in anticipation of the iPhone 4 launch, decided to sell my iPhone 3G on eBay. It sold on Thursday night for £200, sent immediately on Friday, received this morning. Got a positive feedback for the transaction, which meant the money was released and I've transferred to my bank account. Six hours later I've received a message from the buyer saying she wants a refund because the phone is 'barred'. She bought the phone for fathers day, so doesn't sound too tech clued up, but I'm now trying to think if I've done something that won't let it work for her. I went under general settings in the phone and erased all data, packed it and sent it. Any ideas?