Devices such as GPS Jammers are used to block signals so that, in theory, your Black Box won’t be able to pick up your location. They’re cheap and easy to buy and people think that by using them, their journeys won’t be logged, and any driving mistakes won’t be picked up. This isn’t the case – yes, the signal will be blocked so the device won’t know where you are, but the box still knows the car is moving and will log this as usual – so there is literally no point in getting one of these devices. If you do get one, you should be aware of a few things.
1. They’re illegal and should you be stopped by police and found to be using one, you may incur a fine, points on your licence or a driving ban.
2. Even if you use one, when it’s turned off – all the data will be backlogged and uploaded anyway.
3. If you use one and end up in an accident, it could invalidate any claim.