I can see two faint grey vertical lines on either side of the screen if I have a light (white) background and brightness settings 1-3! I haven't come across any other issues but I have noticed the lines and they are now bugging me. Are these lines normal or do I have a duff handset? I have a couple of weeks to change it if necessary but I am also aware of the stock availability due to high demand. Anyone else in same situation (O2 UK handset)?