That 4ET03 won't help us pin down the model any. First two characters of his serial number will. You can buy maps for any of these devices, but you can't transfer them between devices. So he could by an Oz map if needed for your area, but you can't 'lend' him one of yours. If you have the 1st to letters of the serial, we can be more specific about how he can go about loading addition or alternative maps.
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