Sierra Wireless AirCard 550 User Manual page 19

Your PCS Connection Card's ESN (electronic serial number)
The ESN is printed on the card's label and can also be displayed
during the installation process.
A pen and paper to write down your account information
During this call, PCS Customer Service Solutions will help you select
your service plan and guide you through the activation process. They will
also provide you with the following important account information:
Your card's Activation Code
Your card's Phone Number
Your card's Lock Code
Tip: You can use the Lock Code feature to prevent others from using your
account should your PCS Connection Card be stolen. See page 78 for
instructions on using this feature.
Unless your card has been pre-activated, the PCS Connection Manager
application will automatically detect that no account has been
configured when you run it for the first time. The Sprint Activation
Wizard will then launch to guide you through the activation and
configuration process.
Section 1: PCS Connection Card Basics
1B: Getting Started 13