It didn't invalidate my agreement, I still get charged every month.

But, if something went wrong and you for some obscure reason could not revert it back to the original as supplied firmware might find BT has a dim view of it .

However, that said, if the modem is barfed, and you get a replacement, no-one is going to check what firmware hack has been done ...

I guess the main issue with hacking it is that if it goes wrong and you can't revert it you are left with a bust modem and no Infinity (just "beyond" !!!). And ... not everyone is completely happy about doing firmware upgrades etc ...

Oh, those happy days flashing up a new BIOS to enable Windows 95 to network boot!!!!

Cheers,

Rob

It's ok, they already sent me a replacement so I have a spare. If the modem breaks they don't want it back, they just replace it. If you move house, they say to leave the modem for the new occupants (to ebay presumably).