Well after all my constant issues with the No Service issues on my iPhone 5, I cancelled the Genius appointment thinking the iOS 6.0.2 had fixed the issue.
No such luck. I now have a useless piece of aluminium that constantly loses service and then stays there. To add insult to injury an iPhone 3GS on the same network has reception.
I have tried everything. Full restore now, hard reset, but still I am left with a iPod Touch rather than an iPhone. Not acceptable.
I will see what Apple’s resolution is but judging by the posts on the Apple forums there is no resolution yet.