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I just bought a Phone here yesterday running with Android ICS, the first time I used the wifi was ok, no problem. But now, the wifi is not working sometimes even I have a strong wifi connection. My PC, and my phone are on the same network. My PC is reading Full signal strength, as I am literally 5 feet from the wireless router. My phone is showing NO blue. Wifi meter is grey even if I have excellent connection, If it is blue, I can use my internet, but when it is grey I can't use my internet. I have the blue wifi around 20% of the time. What should I do?

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See also: What does it mean when the connectivity icons in the status bar go white/gray? -- though that does not explain why your Internet should be completely disabled. Only Google Services have no connection, while everything else should be fine. – Izzy Mar 5 '13 at 21:03
Have you tried restarting everything (router, phone)? Are you sure your router has enough available IP address and doesn't have a QoS rule blocking access? Can you connect to any other WiFi network? Are you sure you're connecting to the correct SSID? – Mr. Buster Mar 7 '13 at 19:00

Exchange the phone for replacement. Most likely defective wifi card in phone.

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That's a pretty big leap without knowing if the OP has done any basic troubleshooting. – Mr. Buster Mar 7 '13 at 19:01

wifi not blue means net cannot connect with google server! if u have rooted ur device just go to etc>hosts.bak using root explorer just add a '#' before the ip at the bottom line. Hope this will resolve ur issue works 99% with evry1! or try that on the first line ip!

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