Android 4.0 WiFi stuck on

This seemed to be different to the other Android 4.0 WiFi issues people have been reporting so I decided to start my own discussion, to see whether anyone else has this problem. My phone will connect to WiFi hotspots without a problem, and I can generally turn on and turn off the WiFi as expected. However, I have noticed that whenever I physically leave a location which is covered by the WiFi hotspot I am connected to, the phone's WiFi appears to remain "locked" to the hotspot. Obviously in reality this isn't happening, as there is no longer any connection, but it still shows up with a full signal. What is most annoying though is that I cannot turn off the WiFi. Using any of the soft options to turn off the wifi does nothing to the wifi connection, and it will not pick up any new wifi hotspots, nor will it allow me to do a scan or anything in this mode. What's more, because the phone thinks it is connected via wifi it does not have any data traffic, so I have no internet connection.This cannot be rectified by trying any other fixes such as putting the phone into airplane mode (even in airplane mode it displays the wifi as connected at full strength). The only way to restore functionality to my phone is to reset it (which is an annoying two step process thanks to Sony's decision to not enable a soft reset option unlike other versions of Android 4.0). At first, the fault seemed more intermittant (i.e. it did not happen every time I left the WiFi spot) but now it is happening every time, and is incredibly annoying. Does anyone have any idea what's going wrong here? It is not a router problem so please do not suggest that I change channels etc.On the whole I have been extremely disappointed by the Android 4.0 upgrade experience for this phone. For a dual core 1 GHz processor it runs like a slug. There's so much slow down on browsing and even looking at the main screen. I stopped using the xperia wallpaper but even with a static picture the main menu screens still seem very slow. The comparison with gingerbread is staggering. With gingerbread, this phone wasn't bad, but the dated software needed upgrading. With ICS, at times the phone seems unusable. However, I can cope with slow down (with a few grumbles), but this wifi issue is really, really annoying me and ruining my Xperia go experience.

Hi,Sorry for the late reply - I thought I would share my latest results regarding this problem, as the Sony online support people in Hong Kong seemed to know about this bug and offered a temporary solution.Apparently, this is a software issue that is known by Sony, and they are working on a fix. The problem (according to them) is that the phone's Wifi locks up when it "remembers" too many WiFi networks. They will release a software update, but in the meantime you can "fix" the issue by only remembering ~1-3 wireless networks (i.e. the ones you use the most).The steps are as follows:- "forget" all the networks in your WiFi list apart from the few that you really want to keep.- perform a "settings reset".Then it seems to work fine. Hopefully they'll release a fix soon (maybe with 4.1?) I thought I'd share this here as this appears to actually be the answer to my problem, just in case anyone else was having a similar problem.

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Hi Hemanth,
Thanks for your reply. While testing with the setting you suggested is still underway (looking very promising so far!) do I get it right that the laptop now keeps WiFi up at all times incl when asleep? If so it's a good workaround but I'd still like to drill down to the root cause of the problem and hopefully obtain a real fix for it, so that (with the checkbox checked) WiFi is turned off upon my laptop entering standby/hibernate and resumes properly upon taking the laptop out of standby/hibernate.
Update: WiFi card make/model = Intel 4965AGN, driver = 13.3.0.137 by Microsoft dated August 15th, 2010. The following thread tells me Intel no longer support this card and in particular have never released Windows 8 drivers for it, so they're advising to use basic MS ones:
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Will try the same when I'm at my parents next, which is where that laptop is. It'd be great if it fixed my issue too but if not I'll stick to the w/a you supplied.
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@NO_SCREENNAME@ wrote:
I enjoyed EA2700 for more than 3 months so far until I decided to change my cell phone to Galaxy S3.
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