On my old phone (Huawei P10) I had setting which allowed me to support my wifi via mobile data, if the wifi signal wasn’t good enough. This didn’t work perfectly, but it helped a bit, since my wifi quality varies a lot.
I can’t find this option on my FP3, so I often have to manually deactivate the wifi, when it’s slow again, to use my mobile data instead (which I have plenty of, but not enough that only want use that).
Do any of know a solution for this? I would also be interested in other solutions, even if root etc is required, to improve the data use!
I think that maybe the option you are looking for is present in the FP3 as well… You should go to Settings->System->Developer Options and find the toggle “Mobile data always active”. If you enable that, the handover from low wifi signal to mobile data should be quicker (of course you use a bit more battery).
Check if it helps!