F9r1ng1t9mw]http://www.youtube.com/watch?v=7vvYmo8OR2Y
Alternative way some devices (all device, use some similar way):
For the newer models (e.g. Nuvi)
- Turn on your Garmin GPS.
 - Select Tools > Settings > System > About
 - Write down the ten (10) digit Unit ID
 
- Under Main Menu select Setup
 - Under Setup select System
 - Select Menu button on GPS
 - Select Software Version
 - Write down ...
 
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