Just got turbo-ed. Nilai, Negeri Sembilan

Try Extreme BroadBand Cyberjaya server. It's fast.

No. Do you have telephone sockets at home?

Great!

Not sure about RGX4400, but last time I complain my RG212M 's Wifi couldn't reach upstairs, TM gave me TP-Link C1200. Now it's Wifi already max out at 200mbps. Time for new router I guess.

Several methods to do this:
1. One powerful, expensive router to cover the entire house
2. Single router, multiple Wifi APs, connected by gigabit cables, or Powerline adapters
3. Single router, multiple Wifi APs, connected by Powerline adapters
4. Mesh Wifi system (including ASUS AI Mesh)

All 3 methods have pros/cons:

1. Easiest to do. Still doesn't guarantee great Wifi speed across entire house.
2. Great Wifi speed everywhere. Harder to config. Need to lay cables.
3. Great coverage & good Wifi speed everywhere. Powerline subject to electrical interference.
4. Great Wifi speed everywhere if correct mesh position. Easy config.

Lucky you can use 40MHz width on 2.4GHz band without overlapping.

I'm using C1200 too, and managed to get 200mbps download on 5GHz N.