We assess the user manual, email and telephone support and SIM insertion, where necessary. We also assess configuring, activating an SOS, recharging, using the buttons, the shape of the device and whether it is easy to grip and carry.
Old models tested under a pass/fail methodology. New models were assessed for their effectiveness, which is why they have a score. These results do not contribute to the overall score. NA means they don't have this feature.