There are such products on the market and on the Internet, but there are unscrupulous merchants who cheat money under the banner of GPS trackers. Some merchants boast that they can accurately locate the other party's location just by entering the other party's mobile phone number. This is not credible. I hope that consumers will not buy such products because they are in a hurry to find someone. According to the principle of GPS, the positioning effect can only be achieved when the GPS locator is placed beside the person being located or inside the car. Otherwise, positioning cannot be achieved.