First, you will need a working Android Smartphone that you may want to give away, trade or sell.

Make certain that:

I used the 2015 OnePlus 2 for this solution, you can find more on it here:

Step 1: Add a Google Account

Next, go to "Settings" and then scroll to "Accounts"

Log in with your Google or Gmail account. You can also create a new Google account just for this.

Step 2: Turn on Location

Next, head back to settings

Make sure that location services in on and actively locating this device

Next, find a secure location in your vehicle to hide your old smartphone.

Make sure the area is dry, not too hot or wet.

Be sure that it's effectively receiving GPS signal and remains connected to your mobile data network.

From another mobile device or from a computer, log in to Android Device Manager.

Note:

Be sure you're logging into the same account that the hidden smartphone (tracker) is using.

Now, as your vehicle is in motion you can use Android Device Manager as the tracking platform

You'll be able to achieve real-time updates, it's TOTALLY free to use and managed by Google.

You may view the included instructional video for full details and see the EPIC outcome.