[potionmaster]

Sadly it really does not work. I've tried several times and have held the keys for about a minute but nothing happens. I've tried it when the phone is completely turned off, while it is starting and I'm seeing the o2 Logo, while I'm seeing the Windows Mobile Logo, while it is on and the keys are locked but all to no avail.
I think there's really nothing to do but bring it to the shop. But thanks for the help!