Start with telling us the make and model of the modem/router please
. Then someone may be able to tell you how to find the line stats. Basically we are looking for information like
Upstream rate = 14193 Kbps, Downstream rate = 65258 Kbps
SNR (dB): 6.2 6.2
Attn(dB): 19.0 0.0
Pwr(dBm): 13.7 7.4
Those tell us what can be expected from your line at the moment, as opposed to what you are getting and what might be possible with help that with luck will come later. Forgive the high speeds, I'm on FTTC.
Which ISP and product are you on as well please? This can be relevant.
Kindness isn't going to cure the world of all its awfulness but it's a good place to begin. Daisy Ridley.
My broadband basic info/help site - www.robertos.me.uk.
Domains, site and mail hosting - Tsohost
Connection - AAISP Home::1 80/20. Sync 65258/14193Kbps @ 600m. BQMs - IPv4