An old Android phone can work as a GPS tracker: install AndrIoT, allow location, and the dashboard shows where the phone was last seen on a map. For a car or bike you add a charger, for luggage you rely on the battery, and in every case the phone needs an internet connection (Wi-Fi or mobile data) to report where it is.
This guide explains how phone location works, the setup steps, how to power and place the phone for a car, bike or bag, and the limits: batteries, indoor accuracy and the law on tracking other people.
Key takeaways
- The dashboard shows a GPS location map with the last known position of the phone.
- The phone needs a data connection to report. A SIM with data or a mobile hotspot is the usual way outside Wi-Fi.
- GPS works best outdoors with a clear view of the sky. Indoors and in garages it can be poor.
- Battery life is the big limit. Plan on a charger in a car, a power bank on a bike or case.
- Only track things you own. Tracking another person without their knowledge is illegal in many places.
How phone GPS tracking works
The phone works out its position from satellites (GPS) and nearby Wi-Fi and mobile networks. The AndrIoT app sends the position to the dashboard, which shows it on a map. Because the dashboard only knows what the phone tells it, the phone has to be on, awake and online.
Step-by-step setup
- Install the app on the old phone: the Android app for Android 5+ or the Legacy app for Android 4.1 to 4.4.
- Pair it with the 6-letter code from the dashboard at app.andriot.net.
- Allow location when the wizard asks. Choose the option that allows location all the time, if your Android version offers it.
- Exempt the app from battery saver so it can report in the background.
- Give it a data connection. For use away from Wi-Fi, insert a SIM with a small data plan, or use a mobile hotspot from another phone.
- Check the Location tab in the dashboard. You should see a map with a fix and a time stamp. Walk or drive a short way to confirm it updates.
The phone can also be used without the camera, as a pure location and sensor device. See the sensor hub guide.
Car, bike or luggage: which setup
| Use | Power | Placement | Main concern |
|---|---|---|---|
| Car | USB charger in the car; many sockets switch off with the ignition | Glovebox, under a seat or behind a panel with a clear view of the sky | Heat in summer, drained car battery |
| Bike or e-bike | Power bank or a bike USB port | Under the saddle or in a frame bag | Rain, vibration, theft of the bag |
| Luggage | Charged battery or small power bank | Inside a pocket with a fully charged phone | Battery runs out in a day or two; airlines may ask for phones to be switched off |
Data and Wi-Fi
Location updates are small, so a modest data plan is enough. A video stream is not: keep the camera off for tracker use. If you use a prepaid SIM, check that it stays active, because some providers expire inactive SIMs after a few months.
- Check that the phone can roam if you cross borders, or fit a local SIM.
- Switch off auto-update for apps to avoid surprise data use.
- Wi-Fi at home or a workplace is a good fallback. The phone will report whenever it finds a known network.
Limits and honest expectations
- Not a thief-proof device. A thief who finds the phone can switch it off.
- Weak indoors. GPS can drift or fail inside buildings and garages.
- Reports only when awake. If Android sleeps the app, positions stop. Follow the power guide.
- Battery on the move. Without a charger, expect hours to a couple of days.
- Not a dedicated tracker. Purpose-built trackers last longer on a battery and are smaller. A phone wins on cost and extras, not endurance.
If you lose something valuable, contact the police with the map location rather than going to retrieve it yourself.
Legal and ethical notes
Track only your own property, or people who know and agree, such as a family member sharing location. Putting a tracker in someone else's car or bag without their knowledge is illegal in many places and is against the AndrIoT Terms. For monitoring in shops, rentals and workplaces, see the legal and privacy notes.
Getting more out of location data
A map dot is useful, but a few habits make it more useful.
- Check the time stamp. A position from two hours ago is not where the phone is now. The dashboard shows when the last fix arrived.
- Let it settle. A first fix after a long sleep can be off by hundreds of metres. Wait a minute for it to improve.
- Combine with the battery reading. A phone that reports a low battery and then goes silent has probably died, not been moved.
- Use Wi-Fi status. If the phone reports a known Wi-Fi name, you know roughly where it is, even indoors.
- Name your devices. Call them Car, Bike and Bag, so the map makes sense at a glance.
For a phone that is also a camera or sensor hub, keep location and video on separate phones if you can, so that a tracker can live in a car with the camera off.
What to do if the tracked item is stolen
- Do not go to the location yourself.
- Note the time, the map position and any movement pattern.
- Report the theft to the police and give them the location history.
- Keep watching the dashboard and update the police if the position changes.
- Change your passwords if the phone also held anything personal.
A tracker helps the police, but retrieval should be left to them.
Keeping a tracker phone alive for months
A tracker is only useful if it still works the day you need it. Treat it as a small maintenance job.
- Charge it fully and check the battery reading every month.
- Check the SIM still has data and has not expired.
- Open the dashboard and confirm the last fix is recent.
- Make sure the app is still exempt from battery saver after any Android update.
- Do a short test drive or walk each season.
- Check the phone is not hot or swollen, especially after summer in a car.
Cars get very hot in summer, so a phone left in a parked car can overheat. Keep it out of the sun, under a seat or in the boot area, and check the battery. If the phone shows any sign of swelling, remove it and recycle it.
Pros and limits
Pros
- Re-uses a phone as a location tracker with a map and history.
- Works for a car, bike or luggage with the right power.
- Can add sensors such as battery state and motion.
- No extra hardware besides power and a connection.
Limits
- Needs a data connection and constant power or a charged battery.
- GPS is weak indoors.
- Battery life is short without a charger.
- Illegal to use on people or property without permission.
FAQ
Can I use an old phone as a GPS tracker?
Yes. Install the app, allow location and keep the phone online. The dashboard shows the last known position on a map.
Does it need a SIM card?
Away from Wi-Fi it needs a data connection, which usually means a SIM with a small data plan or a hotspot.
How long will the battery last?
It depends on the phone and battery age. Expect hours with the screen on and a day or two idle. In a car or on a charger it can run continuously.
Is it legal to track a car?
Tracking your own vehicle is generally fine. Tracking someone else without their knowledge is illegal in many places. Check local law.
Will it work indoors?
Poorly. GPS needs a view of the sky. Wi-Fi and mobile networks can give a rough position indoors.