Hi, I've recently converted my black iPhone 4 to a White on completely, including White headphone/audio port, White dock port, LCD screen with digitiser and rear back panel. It was a bit dull of me to do so since the White iPhone was just announced yesterday but I have been having only one single problem prior to converting my phone. My iPhone says "No Service" at the top bar where the carrier information is. There is no signal so I cannot make/receive calls and text messages. Everything seems to work including Wi-Fi but obviously I have no 3G connectivity since the iPhone does not recognise the carrier network. I'm currently on O2. I've almost tried everything, including backing up and restoring, resetting to default settings, removing and inserting the micro sim card, and when settings, general, about, next to network it says "Not Available". Is anyone else experiencing this issue, and how can I fix this? Any help would be great! Thanks. Edit: Is it possible for me to take this into an Apple retail store or O2 store to get it looked at, but I would assume they won't even touch it because of the conversion.