There is no problem in migrating from ADSL2+ to FTTC. Infinity is just the BT Broadband product using FTTC. There are many other ISPs offering it.
There are also many monthly contract good ADSLx ISPs.
I expect BT would happily upgrade you from their Total Broadband to Infinity when it becomes available there, and probably the worst that could happen would be your minimum term extended to 18 months from that date. If you definitely want Infinity, ask them now

. (But get the name of the person you speak to and write it down with the date and time).
Have you checked the estimated FTTC speed (and ADSLx speed) for the address? Have you even checked that FTTC will be available there, at least in the initial launch for that exchange? It all depends on whether the local cabinet is enabled, not just others on the exchange.
My broadband basic info/help site - www.robertos.me.uk
My domains,website and mail hosting - Tsohost.
Internet connection - IDNet Home Starter Fibre.
Live BQM.
"Where talent is a dwarf, self-esteem is a giant." - Jean-Antoine Petit-Senn.
Edited by RobertoS (Sat 21-Jan-12 22:12:40)