I have been using testmy.net (Hong Kong server) for about 2 months prior to signing up and the results were very similar to speedtest by ookla. I'm usually getting above 1.5mbps download and more than 650kpbs upload. I have a 2mbps package with a telco company here. Then a couple weeks ago until now I'm getting below 1 mbps. Usually below 600 kbps download while upload is pretty much ok. I tried power cycling my modem and router, and today I got a new modem from the Telco and I'm still getting very low download speed results while upload speed is generally ok. If I switched to other servers I will get a decent speeds for UL and DL but whenever I used Hong Kong server which I need to, the DL speed is very low.
Any idea what's causing the problem whereas before it was ok with the Hong Kong server?