Most radios will display the Radio ID (ESN or SID) when you tune to channel 0. If this doesn't work on your radio, click here to find your radio listed and follow the instructions on how to display your Radio ID.
If you're near a computer or mobile device but not near your radio, you can log into the Online Account Center and find your Radio ID under Active Radios/Subscriptions.
If you need further assistance, please click Chat Support to chat with an agent who will help you find your ESN/Radio ID.