My phone seems slow to connect to our home WIFI and very often it will appear to be connected, but there is no internet access. A common message in the browser is name look up error or something like that. Because it randomly disconnects I expect I get more cell data use that should be happening at home. I seem to think it is primarily an issue with our home network though I rarely connect to WIFI out of the house. I can be in the same room as the WIFI and be "connected", but not have internet access. Then some time later it will be there....
