IOS 4.2.1 slowing down all apps and reduces battery life on 3G

I am sure there will be many with this issue as most of us had to sign 2 year deals 2 years ago. After updating my 3G to 4.2.1, nothing works as it used to anymore. Anybody any tips?

Add me to the list. This is so frustrating, the battery life of my iPhone 3G (MB496BZ) after updating it to 4.2.1 is ridiculously short. I have noticed that apparently WiFi is always on now (even while on standby) and I really don't think turning it off before putting it to sleep is a viable option. Hasn't Apple tested this thing before releasing it? This is outrageous!
I also have an iPhone 4 (MC605BZ) and, although the battery draining issue is less apparent on the iPhone 4, it also has both "Usage" and "Standby" times exactly the same, hinting that the issue is also there...
Additionally, there was another topic on the forum (http://discussions.apple.com/thread.jspa?messageID=12791776) that was a little bit more "energic" about this issue and it has been apparently PULLED OFF by Apple! What's going on here? Google cache has some of the history on that thread, but just up to Dec 21st. From Google's cached version, you are able to navigate to other pages on the thread... Very strange!
Apple, please fix this!

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*Feedback*
"Use the form below to send us your comments. We read all feedback carefully, but please note that we cannot respond to the comments you submit."
http://www.apple.com/feedback/ipad.html
We can complain about Apple's business decisions, but these discussions are user to user talk about possible solutions.
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TS1398 Hi.. My internet and wifi are working on samsung phone and hp laptop but its not getting connected to iphone ipad, only skype is coming online rest all apps and safari show no internet connection. Got new linksys router WRT160NL , but situation sam

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B-rock

TS3274 Hi I have a 1st generation iPad 64Gb, my problem is when I am surfing the Internet or trying to read a magazine that I have bought and downloaded, the iPad closes down the app and the screen goes blank and then back to the home page. Any ideas?

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Welcome to Apple Support Communities.
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IOS 4.2.1 slowing down all apps and reduces battery life on 3G

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