Choose a Cell Phone PlanChoosing a plan is dependent on how much you will actually use your phone, as usage time is the basis of every calling plan. Other things to consider:
If you have a world phone (GSM 900/1800/1900 or a GSM 850/900/1800/1900) and plan to use it in other countries, choose service with international roaming.
Another option to consider is a shared or family plan, which allows you to share your monthly airtime with family members. Moreover, check if calls made to other phones on the same carrier's network are cheaper or free.
You also have to think about when you'll be using the phone. Most carriers offer lower rates on weekend minutes and night time. And night is not the same for all carriers - nighttime starts at 8.00 p.m. for some carriers, for others it can be 9.00 p.m.
Prepaid PlanWhen should I consider a prepay plan? Prepaid plans are offered by most of the major carriers in US. The idea of a prepaid plan is that you to pay a certain amount in advance for airtime minutes. Prepaid plans allows you to go on a "pay as you go" basis. When you have used all of your minutes, you buy more minutes.
You are not committed to paying a monthly fee and there is no minimum contract period. With a prepiad plan you don't have to sign a one- or two-year contract and lpay some fee if you want to cancel before the contract expires.