We have three users i.e. I have Nokia 6.1,My Brother have Nokia 8.1 and My Cousin have Nokia 6.1Plus but what we faces commonly i.e. Wifi Connection On hidden wifi network.We get connected quick on JioFi Router i.e. Public but unfortunately couldn't connect on hidden office network i.e.BSNL(Sometimes Connect i.e. 1/10 taking too much time).My Nokia 6.1 connected very well from July to October i.e. Oreo 8.1 but After Updated to Pie 9.0 it couldn't get connected.Similar Things Happen On Nokia 6.1Plus,Nokia 8.1 also.2.4Ghz/5Ghz or both hotspot,Reset Network Settings,Restart Device or even factory reset didn't work.May Be Pie Build have issues on wifi connection.