If you’re about to buy a new iPhone 4, you should consider selling or trading in your old one.
If you want to sell your old iPhone on eBay or Craigslist, take a look at our guide — How to Sell your iPhone Online — which tells you how to wipe the data and good strategies for getting the best price.
Selling your iPhone online will get you the best price, but will likely involve a degree of hassle, of course. Probably the easiest, hassle-free way to get rid of your iPhone is trading it in with Gazelle, an electronics recycling service.
You can even trade in your iPhone from your iPhone. Here’s how: