I have some PMP Medusa, that have set the Region of Europe by default, like you can see in the next picture, and that We can not change it. Is there a way for change that and can choose other region or the region other to test?
If this product is being used within ETSI regulated areas, then the model must be locked to Europe region code to avoid violating regulations, which is exactly what you are seeing.
This is a strict requirement of the regulatory body, and cannot be defeated.
