hi i was upgraded my tablet by external storage and after that wifi did not connect to my wireless orginal android version was 4.0.3 and now is 4.1.1 up date name is :CHAGALLF14205 i was controled all things that says on web site about version check!
when i turning on tablet,for the first time after up date,the wifi was connect successfully without any problem when turning off,for twice run,wifi did not work properly its turn on and searching and find my wireless and connect but for less than 10sec!
Hi, Like you I had a similar issue. After looking at some of the forum, seems a Android issue, especially if you have upgraded.
Fixed I found were: 1. Download a free app called WiFi Manager from the Play Store. When loaded, ask it to manage your connection. Never had a issue since. 2. Another thing I did was to remove my 3G SIM. Even thought I asked it not to be used, and disabled the mobile data part, I had a funny feeling there was still clashes going on.