And something off topic.
Working on a GPS Tracker over IOT Helium network -
K1 Chirp Tracker
No need to pay SIM cards. (But Helium and servers also cost something)
4th prototype works as a charm. Note that professional holder.

I am even surprised to reach 140km over LoRa (long orange line in a map). Over a piece of cable you see in a picture.

I am calling this spider web - where is Helium Access Point which is catching you.
Real time data in a shared excel, so you can read data from here. Or I can do html PUSH for further data gathering and processing.
Of course, when I hide antenna inside a case, close to electronics and battery, there will be lot of loss. In populated areas we should be fine and should get the reception. Check Helium IOT map:
Helium World
Let me know if somebody would be interested. It is not easy to go into such a project.
For my personal use it is ok even in this beta state (I started with this long time ago, just as I was curious about Helium network).
I have lot of ideas for further improvements and wanna come up to a bike rear flash light with Chirp tracker. (yes, will be expensive rear flash light

) There could be lot of use cases. Will add also external Temperature and Humidity sensor.
Also can offer as a modul for DYI guys. (ESP32 S3, Lora, GPS ublox M10Q , g-Meter, Charging, CP2102 USB driver, simple battery V-meter - so wont be cheap unfortunately)