900 packages

some on here have reported getting the BT 900Mbps FTTP packages for a good price. as my 150 package ends soon i was wondering if my exchange will allow a 900 upgrade so does anybody know which checker I should use to get the answer.there appears to be a few different checkers/ways of checking so which is best. I am on EAWCT (walcott) exchange for phone line but dont know if that is where the FTTP ends/starts from.
thanks

Best thing to do would be to phone BT and ask if they can sell it to you. If you are an existing customer, especially one coming up to end-of-contract, they will be very keen to sign you up for a new term.

Even if you are on an ECI OLT you should at least be able to get 300M - although that would be annoying now that they are offering 500M for the same price.