I have used this fix successfully on several different ICS (Ice Cream Sandwich 4.0.X) and JB (Jelly Bean 4.X.X) tablets to fix intermittent WiFi problems. It is simple and worth a try if you are having difficulties:
Unfortunately you'll need access to the root directory either via ADB or by rooting the device.
There is a file, wpa_suplicant.conf, that contains the WiFi connection instructions for networks that you have previously connected to. Deleting this file and letting the Operating System rebuild fixes a variety of intermittent WiFi issues (not hardware issues like poor signal.)
Unfortunately you'll need access to the root directory either via ADB or by rooting the device.
There is a file, wpa_suplicant.conf, that contains the WiFi connection instructions for networks that you have previously connected to. Deleting this file and letting the Operating System rebuild fixes a variety of intermittent WiFi issues (not hardware issues like poor signal.)
- Locate the wpa_suplicant.conf file in data/misc/wifi using ES File Explorer or some other method of your choice
- Turn off WiFi (Settings - WiFi)
- Rename the file wpa_suplicant.conf.bak or just delete it
- Restart the tablet
- Turn WiFi back on
- Restart the tablet again