Share your experience!
Hi. My name is Filipe Marques.
I have a problem with the wifi. My phone is updated to ICS 4.0.4.
I can connect to a wireless network with no problems but, i can't disconnect. Only if i turn my phone off.
Any ideias?
Yes mate, I'm having the same issue than you do. Check here: http://talk.sonymobile.com/thread/57039
This problem is worldwide. Im from portugal and every foruns about android have posts discussion this bug.
Hope sony realizes we dont need excuses, we need a fix!
I'm from portugal too. Vodafone
small world 
YAY nothing worked but this worked for ma:
"if you have acces to root, try to delete everything in folder "/data/misc/dhcp"..worked for me"