Having the same or similar problem. Once wi-fi connectivity drops, have a hard time connceting. Sometimes turning off and back on works, sometimes not. Sometimes unplugging the router on/off works most of the time. But I can only do that at home. Ridiculous to ask others, can you please reset your router so I can connect.
Well, if someone posts what can be done to correct this, it would be appreciated.
have you double-checked that in the WiFi settings in the Settings menu, that you have "Automatically connect to Wi-Fi hotspots" enabled? also try performing a soft reset (pressing the volume down and power buttons together until the phone vibrates).
It did not help, one more thing I want to add to the observations is that, when I am connected to a wifi network and i move out of reange the phone still shows that its connected to the network. When i go into the range of another wifi, my phone is still stuck on the old wifi connection. I have to disable wifi and re enable it to search for networks.
It all very frustrating.