[T-Mobile Samsung Galaxy S II SGH-T989] DesperateScorpion:
I need your help everyone. My brother is using the Galaxy S II running ICS 4.0.1 that was bought along with my S III and it is acting up. GSII is running stock ICS, and still in stock configuration. Phone is not rooted or messed with in any manner. The phone connects and stays connected to the Home Network, but data transfer stops after few seconds. All the other devices at home (laptops, PC, other phones) stay connected and works fine. Home network is through Century link and wireless is through actiontec modem and wifi router - http://www.actiontec.com/products/product.php?pid=264#.UOyOPB3aI7s). He has been using this phone with no problems with the same wireless network for almost 4 months and this issue started almost a month ago. I have no idea why it went wrong all of a sudden and not had any luck in finding a solution from all my research. :confused:

Problem: When WiFi is activated, it will connect to the home wireless network and will work for few seconds. As soon as background activity that requires data stops, the WiFi stops working. If I am browsing or a video is playing on Youtube, it will stay connected, but as soon as I exit out of the application that is pulling data, it stops working. I have to turn it off and back on again for it to work, but this issue repeats. From looking at the signal bars for WiFi, its full (I was sitting next the router) upload arrow blinks once in a while but noting on the download. None of the apps are connected to the network. Browser will show loading for a while and then displays no network connection message. I tried google play, youtube, third parts apps etc. to ensure its not just the browser. When I turn off the WiFi, the phone seams to download a bunch of messages and updates that was not being pulled for a while. My GSIII connects fine with the network and it works fine even after being idle for hours. I have no idea what is going on and would really appreciate any help. I am close to calling Samsung and T-mobile, but thought I will try here first as we all know how easy it is to deal with those guys.

Things I have tried so far: I have tried all of the following based on suggestions I read from other forums I found through google search.

1. Factory Reset the system: FAIL. After the reset was complete, I waited for everything to finish loading and then I connected to WiFi by inputting all the necessary details. Same results, will work for few seconds and stops.

2. Restart the Modem and Router: FAIL. I do not think it is modem or router related issue as my S III seams to connect and work fine.

3. Turn off the security for wireless network: FAIL. Same result as above.

4. Try different encryption: FAIL. Same result as above.

5. Forget the Network and redo: FAIL. Same result as above.

6. Change the IP address to Static in advanced settings for the network: Worked for a while and then this stopped too.

7. Change WiFi sleep policy: FAIL. Changed it to " When device sleeps", "Never" and "Always", does not make any difference.

8. Third party apps suggested by everyone: FAIL.

This is where I am at right now. I have tried to include all the information possible. Please ask me if any other information is needed.