I may be wrong ...but arent the routers MAC address assigned to the customers data..? making someone else's 2504N off ebay useless?
Sky routers connect using the routers MAC address@skydsl for the username with a password generated from default wifi password that comes with the router - I would imagine that if this does not match the details registered for
your router they gave you then it will not work and you can not change the log in details on SKY's F@ST 2504N as the firmware locks you out of that sort of stuff and as far as im aware there is no firmware available that would allow you to SET the username & password in the sky 2504N router that you could buy off ebay
the only thing I can think of that will void this is if SKY allow
ANY correctly configured SKY router to connect over
ANY of their lines... in that case ANY sky router should do...as long as it hasnt had its login/firmware changed to be used for another ISP.
hopefully someone can clear this up as i also would like to know