Yes. My 3G became unusable, half of the time. Typing a text message became a difficult task. Not only did it take 30 seconds just to open the SMS app, pressin

Yes. My 3G became unusable, half of the time. Typing a text message became a difficult task. Not only did it take 30 seconds just to open the SMS app, pressing a character would cause the phone to lock up for a few seconds, leaving the character in its pressed state. Please note, this wasn't constant though, it did work half of the time. Overall upgrading to 4 seemed to be a huge burden on the phone for whatever reason. I've since upgraded to an iPhone 4 which is fantastic.