My SMARTY experience after 1+ month of use

I have a smarty SIM in a router and it works but isn't fast. I have id mobile in my phone and it's similar speeds. I'm in a congested area and it's just what we have to deal with. My smarty SIM is literally for fail over as my fibre isn't the most reliable. I was originally with EE years ago and then it got so congested where I am most the time speed tests hung around 0.04mbps. it was unusable so I swapped to three and got very good speeds. Over the years it has slowed in my area and that fine they are cheap and congestion is high however I have tried other networks and have similar issues. Personally as a backup it's usable. We are a household of 6 and multiple days I've switched out fibre off and it's handled it. We also had 24 hour outage so had to be used as our main source. I only get between 15 and 30 but it was enough to have the TV going and the kids tablets plus cameras and all other smart stuff that uses the internet. I personally don't think there is any throttling or traffic shaping last month I used 703gb so pretty heavy use and it's been fine. Last couple days we've had a drop slightly in speed but did state on the checker the other day that they were working on the mast so quite possibly that. Now If EE could give me 100+Mbps would I take it ? Probably not for the backup or my personal phone as everywhere else it's usable and that's fine by me. I couldn't care less about getting 100+ I have that at home. I just want to be able to doom scroll or watch videos and maybe download the odd app. The other day I went to a town down the road from me and my speed test was over 1000mbps during peak times.