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Hi Sony
i think it's better that you Test your ICS before release
test it : while wi-fi enabled, go to Airplane mode...
Wi-Fi dosen't work any more until restart the Phone.
and i can't Connect to my Gmail Account via my Wi-FI that i thinks it's my Problem.
1st search the forum before creating a new thread as this question has being answered before
try to repair your phone with either SUS or PCC
i repaired my phone twice with two apps that you said
repair it again but this time do NOT install any app and uninstall mcafee
Update Service (SUS)
http://www.sonymobile.com/gb/tools/update-service/
http://www-support-downloads.sonymobile.com/Software%20Downloads/Update_Service_Setup-2.11.12.5.exe
Alternatives on How to backup Xperias
http://talk.sonymobile.com/thread/36355
Don't forget to mark the Correct Answers & Helpful Answers
i did it and this Problem not solved.
McAfee is Uninstalled.
i think this is a bug with wi-fi and Airplane mode