I have just cancelled Astro IPTV which is running on Time broadband. The termination will be completed by end of this month. How soon in advance should I subscribe to Time broadband in order to minimize my internet downtime? I would prefer to switch over on the day Astro terminates. Possible?

I get 500mbps by using speedtest.
However, when downloading file from international sites like Microsoft/Nvidia I get only around 250-300mbps.

Is this due to the servers located overseas, therefore the download speeds might not be able to reach full 500mbps?

Asus AC68U router with PCE-AC68 adapter just nearby to each other in the same room, managed to obtain consistent 500mbps using speedtest. Anyway after a few tries from various files on various websites, I managed to see full ~50MB/s download speed reported by Windows on one instance. So all is good now. At least I know it is working fine. So conclusion is the location of the servers.