If you purchase a discounted phone with a two-year contract and then cancel after the 14-day return period, Verizon will charge a pro-rated Early Termination Fee based on your phone/device type.
For Smartphones purchased after November 14, 2009, such as the Motorola DROID and BlackBerry Storm: Verizon charges $350 minus $10 for each full month of your Service Commitment that you complete.
For a list of advanced devices subject to the $350 fee, check http://www.verizonwireless.com/advanceddevices
For Standard Phones, such as the Motorola Barrage or Samsung Intensity: Verizon charges $175 minus $5 for each full month of your Service Commitment that you complete.
NOTE: Once you fulfill your service contract, you'll automatically become a month-to-month customer.