IOS 5.0.1 upgrade on iPhone 3GS,

Question

Prior to iOS 5.0.1 upgrade on iPhone 3GS, I could readily connect to and use a variety of wireless networks at home, work, and on road.
Since installing the upgrade as prompted on device, I find WiFi is unstable to unusable.
Unless the device is sitting practically on top of a router, I cannot maintain connections.
If I am more than 2 ft out of direct line of sught of router, I lose my connection.
I have to date read and completed the following online suggestions with no success:
1-Restarted router - NO CHANGE
2-Reset Network Settings on device - NO CHANGE
3-Toggled in and out of Airplane mode - NO CHANGE
4-Completed various options for start/restart of device - NO CHANGE
5-Disabled all other services using battery at same time (Bluetooth/Location Services, Mail, Reduced Backlight even) - NO CHANGE
6-Forgotten prior networks - NO CHANGE
7-Attempted to assign Static IP to device on router side - NO CHANGE
8-Restored from backup - NO CHANGE
8a-Repeat 1-6 again - NO CHANGE
9-Restored to Factory state - NO CHANGE
9a-Repeat 1-6 again - NO CHANGE
10-Changed Router security from OPEN to most SECURE - NO CHANGE
10a-Repeat 1-6 again - NO CHANGE
11-Setup new router - NO CHANGE
11a-Repeat 1-6 and 10 again - NO CHANGE
During all of this multiple iOS 4.x devices and iOS 5.0 devices have been on the routers connecting as always.
The device in question functioned perfectly up to the point of iOS 5.0.1 so I know this is not a iPHONE hardware issue nor is it a ROUTER hardware issue.
I have seen this posted frequently and do not believe this to be an isolated state I am in.
Any thoughts and suggestions before moving to another manufacturer all together and get out of this Apple mindset.

Answer 1

Nothing personal (or maybe just a little personal), but simply copying my post from a day earlier as your own is not helpful to the Apple communities or people that coming here looking for support.
It does nothing more than add a duplicate post and decrease the chances that someone might actually include a reference to my original post, which came from MY OWN HARD WORK in troubleshooting my issues.
If you are having a similar issue, post the issue after doing your own leg work and describe in your own words.  Don't simple steal someone else's hard work to troubleshoot the problem as your own effort.