QUOTE(duckaton @ Jul 3 2012, 10:53 PM)
High rise installation.
Maxis will come and install on the SAME TEL LINE that uses streamyx.
so, have to cancel streamyx before maxis can install
or
can install maxis, then go terminate streamyx.
some say terminate first, some say terminate later.
who has install on high rise using streamyx before can confirm?
I scared of no terminate streamyx first,
maxis come say cannot install,
have to wait another 3 months

High rise installation here. I can confirm that you can go ahead with whatever you prefer (either terminate first or later).
The moment TM + Maxis guy come and set-up, TM will just go to the connection centre (or whatever it's called) in your building / block, switch your port settings to their unifi / home fiber (HSBA) port.
I realised the TM guy had arrived (Maxis' guy already beside me, I was doing my web development, online) the moment my internet went off with no ADSL signal. (The TM guy just reconfigure/remove/unplug/change setting/
i don't really know what he do behind), moments later he came up to configure TM's modem configuration and viola! I'm activated with high speed fiber.
The only problem is, I think, TM / Maxis did not activate my account and they couldn't get my connection to online, although the DSL signal is there. They just called back to centre to check and few minutes later, everything's done

Sorry for my long post tho, TL;DR version:
Doesn't matter if you terminate now or later, they're gonna replace your existing port with new installation anyway.