GPS tracking bracelet for a kid - need advice
Most GPS bracelets have a service fee of $5-$10/month. Others require service from cell company - does it mean that GPS is using a SIM card? I was under impression that the GPS tracker should work in the same way as Garmin car units - meaning service is basically free, but that's not what I'm seeing... Wonder why the need for additional service.
Tons of devices are available on the market now. Any popular favourites? The only things important for me are reliability, long battery life, and preferably a lock that's not easily removable by a child (or his peers).
EDIT: The kid is under 4yrs old, I want to make sure he doesn't wonder off from the kindergarden. Also want to track him in crowded places - malls etc - if he runs off. And cell phone is not an option - he'll lose it the first day.