Can I return my iPhone 4 if it's been having problems, so I can get a newer iPhone 4?

I got a iPhone 4 3 weeks ago and yesterday and today it's been having problems with the vibration I've tried everything I even restored my phone… My phone is powered by AT&T… I have not done anything to my phone I've been taking good care of it and this happens… It has not been 30 days yet. Could I still go back and exchange it for a new one?

Definitely. Apple are really good with replacing stuff (usually just take and replace no questions asked)

Yes if you have insurance and yea If you got it a few days ago and have the papers they probably will

The apple store is usually very understanding with problems. Sometimes they'll exchange it for another one instead of giving you your money back.Id definetly take it to the main store.