Hmm not sure why they sent you to carphone warehouse. When I went to my local nokia care centre they sent me to carphone warehouse. But that was cause I bought my n900 in US and they said that means my warranty was not valid in the UK and the care point only does warranty repairs but the carephone warehouse service would fix it if I have my US receipt. Carphone warehouse held the phone for two weeks and then returned it saying the fault was caused by moisture damage which is not covered by warranty.