Not really - only when the password is wrong or the wifi has gone down. Do other devices connect to it in the same area? You could try an SSID scanner to measure signal strength and check what band it's running on and then google your model of phone to see if people are having issues with that particular band. But most phones should be pretty much fine with anything - it's usualy devices like HRMs and turbos and stuff that are picky about wifi bands.
You haven't just turned off wifi or something silly? Have you tried connecting to any other wifi? Can you hotspot?
Could they have something like MAC address restrictions on their routers? I'm not sure if there's anything special with BT routers - I tend not to use other people's wifi.
Not really - only when the password is wrong or the wifi has gone down. Do other devices connect to it in the same area? You could try an SSID scanner to measure signal strength and check what band it's running on and then google your model of phone to see if people are having issues with that particular band. But most phones should be pretty much fine with anything - it's usualy devices like HRMs and turbos and stuff that are picky about wifi bands.
You haven't just turned off wifi or something silly? Have you tried connecting to any other wifi? Can you hotspot?