I have problem with my downstream SNR margin, it keeps dropping, but no disconnection, but I can't use my line at all when it drops until 0. So I have to reset my modem, and when it sync I get initial downstream SNR for 12 and my download is blazing fast at full speed. But the SNR will keep dropping until 0. My upstream SNR margin doesnt affected though. So my assumption is, this is nothing to do with my phone line.

So the question is, how am I gonna get a port change? Few of users did ask TM before but they refuse as the technician sent to investigate the problem cant find any problem. Well of course! They wouldnt mind the SNR margin as long as your modem is not blinking and your speedtest seems ok.

Note: When my downstream SNR margin drops to zero, its still synchronized without disconnection, but I can't surf/download/etc anymore until I reset my modem. This happens from morning until late night then only I can get stable SNR margin.