Most VOIP plans are month-to-month services that do not require signing a contract. Think of it like your cable TV plan. You pay monthly -- usually in advance -- for services and can stop anytime. Make sure your VOIP plan offers the same deal. Even better, look for one with 30 days free or a money-back guarantee. That way, you can try out the service in relative comfort, knowing that you are not making a big commitment, or laying out a lot of cash for a VOIP Plan that doesn't work for you.