I too am not sure what you mean by "7 series"
my phone's serial number also starts with a "7" does that make it 7 series?
on to other glitches...
Since the 1.1.1 update I have had most noticably much diminished battery life. down from around 6 or 7 hours of general use, to as little as 3 hours of the same type of use (some internet, some email, some music, some calling).
I have also noticed that sometimes, and NOT when I'm using my iPod funtion, I will see the play icon on the home screen (up next to the battery icon). This is to signify that something is playing in the iPod function, yes? Well this happens to me every once and a while and always when I'm NOT using the iPod. Anybody get that one? to get rid of it I go into the iPod and start/stop a song, that cures it, but does that mean that something is playing in the background that shouldn't be? could this have something to do with the slacking battery?
I have also had a few scattered screen freezes or lockups, but nothing that can't be fixed by rebooting.
I have tried, on the advice of the Apple folks, to restore my iPhone, which I've done. It seems to have made no difference in the battery life. Does anybody out there have a similar problem with waning battery life since the 1.1.1 update?
my phone was definitely MORE stable before the 1.1.1 update.