The problem for me and others with WiFi is the following:
- The FP3 has major problems with higher 5 GHz WiFi channels (106 and above I think) when connected to AVM routers, with basically unusable connections. Many examples for this here. These routers are very common in Germany, a lot of people have one at home and you will encounter them all the time when travelling. I have found no reports of other devices that have this problem with AVM routers, which are generally very reliable and receive frequent updates (even models more than 10 years old).
- The only viable workaround on an FP3 with Android 10 is to completely disable 5GHz WiFi connections. Other approaches like disabling automatic channel selection or using different SSIDs for 2.4Ghz and 5GHz are a nuisance when you control the router and impossible when you don’t.
- The option of disabling 5GHz WiFi on the FP3 is no longer available with Android 11. So, unless you manage to completely avoid AVM routers, WiFi is more or less broken.