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Can anyone advise what does this wifi logo means?
why is there an exclanation mark!! beside the wifi logo
It could be that the WiFi connection its too slow or not working, you can check this
http://talk.sonymobile.com/t5/Xperia-Z3/WiFi-Exclamation-Mark/m-p/1008533/highlight/true#M186
It means you are not connected to Google services or you are behind a proxy blocking services