Yes, they work
Hi,
Yes, they do work and very well. My partner, Janet, is in an advanced stage of Dementia and was prone to wandering off and getting lost. She was brought back by the Police many times!
I bought an expensive GPS Tracker costing £180 (only the best for Janet). All I have to do is dial its mobile number, let it ring twice and hang up. After a minute the tracker sends a text with a Google Maps link. It's better to use a smart phone because I just touch the link and her position appears on a Google map. You can type the co-ordinates into Google Maps if using a PC. It also has a big SOS button as well as a built-in mobile phone with two buttons for preset telephone numbers. Janet was never interested in using the gadget's facilities. I have chased her around Deptford with it and successfully found her on umpteen occasions. If no GPS signal can be found (inside buildings, for example) then the text is headed 'before'. It also sends a low battery warning text. Battery life is good and lasts for a week. The device is the size of a matchbox and Janet is fine with it around her neck on a lanyard, along with her ID tag. I use a GiffGaff SIM and pay £7.50 a month for unlimited texts and 200 free minutes. There's no cost when calling the device as you hang up before it 'answers'.
All in all an excellent device and an invaluable addition to my Keep Janet Safe armoury. You can buy cheaper trackers, but I don't know how good they are.
Best Wishes,
David