Quote Originally Posted by Cnfhbr View Post
The GMA (Garmin Map Activation) can be viewed as a signature file co-existing with the current unlock codes from UNL.
For me, it seems the GMA mechanism is designed to facilitate many usage scenarios and it's up to map vendor which one to choose. If the vendor's intention is to implement a region-specific unlocking then yes, both an unlock code for that region and the device-specific .gma certificate can be required. While in another scenario, the .gma file just supersedes the unlocking code file ( .unl), not "validates" it. So the details are up to a map vendor