I have been looking in internet and didnt find any info about this kind of issue...hope somebody can help me with this.
The thing is that 2 days ago, when I return home I realized that my Wi-Fi wasnt connected, and in the Wi-Fi networks, under my Wi-Fi name I got the message "Sign-in is required" (which is weird because I neverd had to do that), after tapping on it and connect, it launches the message of "Sign in Wi-Fi network" and take me to the browser where it tries to open "google.es/?gws_rd=ssl " but nothing happens. Then after a couple of minutes I got disconnected with the message "this network has been disconnected. your sign-in timed out" and then goes again to the "sign in is required".
This issue only happens with my place Wi-Fi, at my office the phone connects to Wi-Fi and works like before and without any problem. And at my place it only affects to my Note 2, my gf S3 has no problem, some older devices like HTC Desire HD or Chacha also can connect to internet without problems, and the same goes for my laptop and ps3.
I tried changing network password, name and nothing. I removed the pass for my network and still the same...and after reseting the router no changes.
As far I remember the day the problems started I almost didnt use my phone, and didnt change any settings at all.
As for the device, I'm runing the original rom with android 4.3. On monday I had a small update throught Kies to "PDA:NE1 / PHONE:NE1 / CSC:NE1 (TGY)" and it worked perfectly.
any idea of what could be the problem?