Have had unlimited data from BT, been having issues when data would just stop, instant 100% packet loss, complained to BT/EE they're adamant there's no problem.
Thought I'll prove it got a payg Vodafone sim and noticed similar issues intermittent just like the issue with BT, I haven't been able to identify a pattern & it happens day & night (no street lights here anyway). Bought a new 4g router just in case & same happens.
So 2 different networks & masts (different locations so not a mast site issue) suffer the same problem. Both have almost full signal with good quality.
I'm wondering if it's interference locally as WiFi has a suspiciously short range here vs our previous home & Bluetooth also craps out at shorter ranges. We do have "low voltage" power lines running off poles over our back garden the are only 240v though
We're coastal rural with nothing really nearby, a farm building not too far away & a small row of 18 houses where we live.
Any ideas/suggestions I don't really know what I can do to investigate.