Do you know, I have often wondered about this.
In the manual it says "If replacing with a NEW battery, follow the instructions supplied with the battery"
In the instructions in the new battery it says to do the 9#9# thingy. However, the new battery comes in a discharged state and thus the 'phone can't be switched on.
So, how the flippin' heck can you enter 9#9#9 etc?
Graham, downloading the manual will be of no benefit to him as it just tells you to refer to the instructions in the battery!
Keith, I'm quite sure he was not talking about the pin number but this silly 9#9# thing.
Andy T.