Roaming prices: Once you are at your home or place of origin, and need to call you will be charged for additional services. This can be a long distance without charge. Do not confuse with the long distance charges for roaming charges. You are a long distance call from your home area. Say you have two or three of the state wanted to make a call to someone far away, for you will only be charged for long distance charges. However, if you're outside your home area, and will call you for roaming charges, and perhaps long-distance charge.
Rollover Minutes: When you buy your calling plan, you may be able to go to the contract, the rollover program. What this amount of minutes you can not be transferred to the next settlement period. For example, if your plan has 500 minutes per month. If you use only 400 minutes, the carrier can be completed within 100 minutes, you can not use it. This program is usually good only until the end of this year. At the time, you start over again.
Family Plan: With most family plans can set a plan where you can buy X number of minutes per month. This will usually give you one or two phones. However, for an additional monthly fee you can have more phones and more people to the system. The system generally works as follows. Your plan is 1000 minutes say, these protocols will be sharing plan for all people. Everyone should have a separate number, but the protocol will be shared.
Early termination fee: This is the fee that your carrier will charge a fee if you withdrawal your contact prior to its expiry. Many times a carrier service may not charge a termination fee if you are moving from the area (the possibility of being transferred, or moving to another state.) However, if you're just dropping the service because you want to use another carrier will probably charge a withdrawal fee.