Try deleting the Wi-Fi setting for the connection and then setting it back up again.

 

As a last resort do a factory reset, it may do the trick.

 

Hi Everyone,
I am so pissed off with Samsung already. My S2 has the same problem. The wifi icon keep toggle on and off. The same goes to the holo icon at setting(Wifi). It cant on wifi.

Fxxk Samsung! Lol sorry quite stress already. Apparently, I could get it on(by luck) after switching off for few hours completely and re-on.

Is it ok to do factory reset will it solve the problem.

Thanks

 

Hi Keith,

I'm sorry you have had so much trouble. I know the feeling. I also know the solution. I went on the internet and spent several days trying all the proposed fixes to no avail. My mobile provider's tech department told me I would have to factory reset. Forget it! Here is the fix that I tried after brainstorming and it worked!

You will need to log into your router. Once logged in, go to the Troubleshooting tab. Click on it and then click on Reset/Reboot Gateway. You should now see several choices: Reset, Reset Wifi Module, Reset Wifi Router, Restore Wifi Settings, Reset Password, Restore factory settings. You should choose reset wifi router. Once you have done this wait a minute. Then go into your cell phone's settings and click on wifi to turn it on. Once it scans for networks it will find your network and connect. You may need to click on wifi and then click connect on the popup window. Give it a few seconds and you should see the phone connecting. It will say "connected" and you will be good to go.

I hope this helps. Please remember that every router's interface is slightly different. However, your goal is to reset the wifi router. My unit is an Arris modem/router, so it may differ slightly. If you don't know how to log into your router you can call your Internet Service Provider and they will walk you through it and give you the username and password for your particular router. The process is very fast and easy. You can also google how to log into your particular router.

Good luck!