The phrases "Activating your phone" and "Activating your SIM" refer to the same process, and either one may be used as you activate your SIM card.
A. When asked for your phone's Serial Number, always provide the Serial Number shown on the label on your Red Activation Card. DO NOT provide the actual Serial Number inside your phone as we will not recognize it.
B. Turn your phone ON. You will know your phone is Active when you are able to make and receive calls.