Hello there, and welcome to my Instructable!
I want to show you how to make a wireless network using a Cricket modem and a MacBook Pro.
Step 1: Connect the Modem
Connect your modem and start up the app Cricket Broadband.
Connect by pressing connect (pic shows disconnect. I'm using it)
Step 2: Rest of the Instructable
Go to Applications and start System Pref.
Go to Sharing
Go to Internet Sharing
In the drop down menu, select Cricket Broadband and check AirPort in the list
Check Internet Sharing in the sidebar
Turn on AirPort (if off)
You can change the network settings in AirPort options.