Can an iphone with iOS3 be updated to iOS5?

Can an iphone with iOS3 be updated to iOS5?

Not unless you jailbreak it. My old iPod has iOS 3, and I can't get any of the apps that are "new." The only way is to jailbreak it.

You can search on YouTube for videos on how to do this. Since this is and older iPhone you don't have to worry about anything.

Search for: how to get iOS 5 on iPhone 2nd or 3rd gen (which ever you have)

I jailbreaked mine and I have access to lots of things, and Ivan even customize it in ways apple won't let us.

It depends on which iPhone you are talking about

iPhone 2G - 3.0 to 3.1.3
iPhone 3G - 3.0 to 4.2.1
iPhone 3GS - 3.0 to 6.1.3

(the iPhones & their iOS 3 start points & last firmwares). The 4, 4S, 5, 5S & 5C don't matter since they start with higher versions of iOS.