Always read the fine print: Always read the fine print. Look for hidden fees. A lot of the bigger companies hide fees. You can usually tell by the amount you are charged before you make a call.

Make sure you are being billed the advertised rate: Check your bill to make sure you are being billed the rates you signed up for.

PIC Freeze charge - you may be charged to switch long distance carriers. You can check with your local phone company ahead of time to find out.

Beware of huge discounts - Some companies offer huge discounts but charge large hidden fees. Buyer beware.