I've rated Mobiles.co.uk good (4*), on the whole they were very good, but a few areas let them down, as explained below. I was called by Mobiles.co.uk when nearing the end of my previous contract (last month). I hadn't previously shared my details with Mobiles.co.uk so they must have used their parent company's (Carphone Warehouse) details which is who I assumed had called. It wasn't until I called Carphone Warehouse later, due to not receiving any email confirmation of my upgrade, that I realised I'd been dealing with Mobiles.co.uk. The initial call went smoothly, the caller was friendly and matched the deal I had found on the Mobiles.co.uk website (bearing in mind I thought I was talking to Carphone Warehouse). The deal I got was significantly better value than anywhere else, for this element the company would get 5 stars. As I mentioned earlier I had to call back when I didn't get any confirmation of my upgrade, following the call to Carphone Warehouse they were able to use the Mobiles.co.uk system to confirm my upgrade had gone through and then sent out a confirmation email. Although I can't blame Mobiles.co.uk, the delivery was a bit of a faff (dpd). Fortunately it was scheduled to arrive on a day I was already off work. Supposedly you get a text message early morning to advise the time slot the delivery will be made, this didn't come through until 10:30. Then around an hour later, I was advised my delivery driver was delayed by 3 hours. Luckily I didn't go out, as he was actually bang on the original time.