iOS 5: iMessage not working – how to fix

How can i fix ios 5 imessage not working issue? I just downloaded ios 5 on my iPad 1 and went to use imessage. I typed in my email and hit next.

Several people have reported an issue in which iMessage service is not working properly on iPhone, iPod Touch and/or iPad. For instance, iMessage doesn’t send or receive messages.

How to resolve this problem:

Turn off and on (restart) your iOS device (press and hold the Sleep/Wake button for a few seconds, then slide the slider.)

If restarting doesn’t fix it:

It has been reported that changing your DNS settings fixes this issue. To change DNS servers, follow these instructions for iOS devices (iPhone, iPod touch, iPad):

Tap Settings
Tap Wi-Fi on the left-hand side
Tap the blue arrow next to your current Wi-Fi network
Tap the “DNS” field and enter the DNS servers; 8.8.8.8 (Google’s Public DNS). For more information about Google’s public DNS, please see this: http://code.google.com/speed/public-dns/