Look at pre-paid cellphone plans carefully

Prepaid cell phone plans are full of hidden costs, and it's often difficult to decipher which plan is best. You can't just compare how many cents per minute, or airtime as many of them add on charges. For example, some plans charge you $1 for each day you use the phone, regardless of minutes.

Read our article on pre-paid mobile plans to learn more.

If you make a significant amount of calls, you may have better luck with a carrier like MetroPCS, Cricket Wireless, or Boost Unlimited. They all have a flat-rate per month, and no contracts. See this article that describes flat rate cell phone plans.