Tablet won't connect to any WiFi network anymore, always shows "saved"
Have the "Saved Problem" on a cheap tablet that came with 4.1.1.

Tried 3 different WiFi networks without success: ZyXel P2601HN, Tomato and DD-WRT.

I was about to return the tablet but, as a last resort tried connecting it to an Android phone in tethering mode. That worked - so the WiFi in the tablet was working? 

Then I tried a fourth Tomato WiFi router using 802.1b mode - also successful. 

It seems this version is picky about the WiFi routers? Could it be the channel assignments - maybe some banned channels due to legislation?