From your registered lines in US and Canada:

Step 1: Dial your access number from the registered line(s)
Step 2: Listen to your account balance
Step 3: Dial your destination number

For Calls within USA and Canada:
Dial 1 + Area Code + The Number

For international calls:
Dial 011 + Country Code + City Code + The Number

From Non-registered lines or calls outside of US and Canada

Step 1: Dial the non activated access number from any phone
Step 2: Listen and punch in your PIN number
Step 3: Listen to your account balance
Step 4: Dial your destination number

For Calls within USA and Canada:
Dial 1 + Area Code + The Number

For international calls:
Dial 011 + Country Code + City Code + The Number