Can the screen on iPhone 3G be replaced when it gets dropped and cracked or do I have to get a new phone?
Yes, you can have a cracked screen fixed. Take it right into an Apple store & they do it right there while you wait. I believe it's around $100.00
Yes, I broke mine and a small fone store installed one in an hour
Go on eBay or amazon and search for the screen. It's about 10 dollars and comes with the tools to do it yourself.