What You Need to Know Before Buying an iPhone 4 From Verizon

Salesman outside a Verizon store that will offer the iPhone
Salesman outside a Verizon store that will offer the iPhone

If you're planning on switching from AT&T to Verizon on Thursday and getting a redesigned and new iPhone 4, there are a few things to consider that could affect your finances: where to sell your old iPhone for the best price; how to erase your data so someone doesn't use it; if it's worth waiting until summer for the new iPhone 5; and most importantly -- if Verizon's phone is worth the price.

As we've written before, getting out of a two-year contract with AT&T can be costly -- up to $325 in an early termination fee (or ETF). There are all kinds of ways to get top dollar for a used iPhone so that you can buy a new one and switch to Verizon.