https://www.imore.com/never-lose-your-keys-or-phone-again-chipolo
https://www.imore.com/chipolo-one-review
The Chipolo device is a small tough plastic keyfob. When it gets too far away from the paired smartphone it calls the phone and it makes noise. Also pairs with an app which can run on other devices to show the phone's current (or last known) GPS location, last location where the paired devices were in contact range, and last location where the phone was used. The app can even be used to extend security if the phone was found/stolen - the phone can be remotely locked/encrypted, data backup can be sent to cloud, selfie cam and mic and siri can be covertly activated to monitor the new operator, etc.
Google "bluetooth tracker", "gps tracker", "item tracker".
There's many other kinds of tracking tags. Active, passive, GPS, bluetooth, cellular. Shaped like cards, slabs, cases, cubes, fobs, capsules, some even fit into SD card slots. You can stick them onto or into phones, keys, wallets, purses, TV remotes, pet collars.
Some of the best ones can be a little costly. But still cheaper than a new phone.
