I had the same disconnection issues as well when I upgraded to the new 30mbps early this year. Then early this month, my Hypptv box kaput so I called TM and they came and replaced the tv box for free. According to them, when a subscriber upgraded the package, it automatically comes with 1 year warranty on all the devices (TV box, router, residential gateway).

I told them abt the disconnection issues and they told me that the Unifi new Dlink DIR850L router would solved the problem and I asked them how to get the current one (white orange color) replaced with this new one. They say that if the current router is faulty then it will be replaced for FREE.

Last week, 'out of the blue' the 6 years old router's antenna broke and I called TM and they came to replaced it with the new DIR850L for free. No more disconnection issue

btw, the new DIR850L AC1200 comes with dual band, 2.4GHz and 5GHz.

hehehehe.. maybe u should called them to come and fix it or get it replaced with a new router even when u have the RM49 router. When they came to your house, quickly change your router to the Unifi stock router. Once they replaced it, put back your RM49 router. At least if they replaced it, you have a backup router...