Verizon Family Finder

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If you have Verizon Wireless then you can get a service for $9.99 per month that will track a phone in your family circle. If you want to keep track of where a teen is visiting, then you would download and activate the app on their client phone. You can set it up to send you a text when the client phone goes out of the set zone. You can set it up to text the client phone to receive a text message. You set the message on the client phone: "Hey you have gone too far from our agreed location. Call me right now."
In addition, you can set arrival and departure texts for when they arrive at school or arrive at home each day. OR you can get to the client phone with turn by turn directions with the GPS app.
You can follow all of this on your Verizon Wireless phone or on the Internet web site.