problem after upgrading to iOS 4.1 - cant text

so i upgraded to the new software and as soon as i did i was unable to send/receive texts or use safari

at times i will be able to text but 9 times out of 10 i will get the "!" that the text wasn't sent

i have great reception where i live so i dont know what the problem could be

any help would be greatly appreciated

 

its an iphone 4 btw and i tried restoring it already