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To manually change the network, enter the extended menu by holding ok (green) and cancel (red) and then turn on the device at the same time. Release the keys when the "Application config" appears:
Make sure "Time source" is set to "GNSS". Scroll down with the setup key until you see "Select network":
Press cancel (red) to start the network scan. If you miss this menu item the device will start like normal. You can restart the device and try it again.
After the scan completed, choose your preferred network operator and press cancel (red).
Please note that the manual network change only works with our global devices.