> Sorry - didn't make myself clear. I understand the possible need for a
> re-boot, it was the request to remove the SIM and battery and then 15
> minute wait that was wondering about. I have a NK N73 that
> occassionally freezes and a switch on and off sorts it out. As in your
> example 1 minute sorts out the problem.
It's possible to stiff a phone such that even taking out the battery doesn't
work. I had a Nokia 6820 which came up saying 'contact service' and refused
to do anything. Power cycling had no effect, nor did removing and refitting
the battery. Removing the battery overnight and refitting it in the morning
did work. Presumably there was some volatile RAM holding data over power off
(with static RAM it happens quite easily).
I suppose it's equivalent to 'power off your PC, remove the CMOS battery,
wait a while, then power up and hope the CMOS checksum fails' - the hardest
reset you can do.
> Being suspicious I suspect it was about getting me off the line. If
> they'd simply asked me to switch phone on and off again, which I
> believe would have achieved exactly the same as the remove-SIM-and-
> battery-and-wait-15-mins routine then I could have done that while
> they waited (and found out it made absolutely no difference...)
Perhaps they thought there was some problem with the radio in your phone,
and then a cold start was the best chance to give it a kick?
Theo