I found a solution of this problem after playing with all setings for a month. I received quite routine advice from Sony support service but it didn't work. They proposed to install thier PC software and upgrade. I did it but it didn't help. Then I played the channels of my D-Link routor and changed them up and down. I install WiFi optimiser from Play Store as Sony recommended. It showed an exellent signal but the problem hadn't gone. Then I found the website of my router and downlaoded the latest service pack. When I installed it the authentication problem has gone. Give it a try. let me know if you fixed your problem.
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Hi ! You are probably aware about this common problem with many Sony mobile phones. I have this phone for 2 weeks and stil can't solve the problem. I browzed the Net and rad a lot of recomendations. I restarted the rotor and the phone. Whatever I did I still can't connect to my home wi fi. I have another Samsung Galaxy phone connected to this wi fi, a desktop PC, a laptop and 2 tablets. As for this new Sony phoe I always have authentication problem message. The signal is exellent. I sent e-mail to Sony support page but they do not answer. Today I talked to the guy at Sony shop and they pretend as if they have never heard about it. I wolud welcome any real assistance. Thanks.
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