After complaining like hell due to IPTV keep disconnecting, TM come and change the router from the black colour one to the white colour one which they said is better. This is like 2 weeks ago and so far so good. Sometimes the speed really like WTF.

I have plan to change the router to those suggested but since I am an IT Idiot, dont dare to try as I wont know how to troubleshoot later. Is there any detail guide on how to do it?