I just found a dead pixel on my p910i 2 days ago and its been killing me. Its this pixel on the top right which wont light up. I've checked around the web and it says that its under warranty, but I bought my phone on trademe. The seller told me that he got it from vodafone, but I dont have any proof of purchase.. can I still get it fixed under warranty? its about 2 months old. Would looking at the imei no. be enough?