Billshrink.com, breaks down what the use of a smart phone will really cost you over the course of a now standard two-year contract. Phones and carriers used for the comparison include the Apple iPhone 3Gs/AT&T, Palm Pre/Sprint, MyTouch/T-Mobile, Droid/Verizon. Missing from the comparison are any calculations for app purchases or average cost of the best selling apps on respective app stores.

