Garmin Unit ID
The Garmin Unit ID number is made of 10 digits and is a unique electronic identifier for your GPS. The number usually starts with a 3 but may not if you are using Garmin Mobile XT or other software. The unit ID is not visible on the unit externally.
There are 2 methods to get your GPS ID.
FROM THE GPS
NUVI AND STREETPILOT SERIES
1. Turn the GPS on.
2. Select the Configuration menu (wrench icon).
3. Select SETTINGS, SYSTEM.
4. Select the ABOUT option where you will see the GPS ID number.
HANDHELD MODELS (Etrex, 60Csx, 76Csx, etc)
1. Turn on the GPS.
2. Select the Configuration menu (wrench icon).
3. Select SYSTEM.
4. Press the MENU button.
5. Select Software Version.
6. The GPS ID will show in the lower line.