We sell various tested GPS trackers for different applications. These trackers contain a SIM that you can install yourself. We provide clear instructions and will support you. We have never sold a tracker that does not work.
You want to know how GPS tracking works? You can read it on following link .
"Have used the tracker for a while and I'm very pleased. The explanation and service is great at the time of purchase and to get it to use. Even afterwards, an email with the question if everything is fine. Nice to know that there are still fair sellers. Super "