Just read that Mictrack got a few different relatively inexpensive personal and vehicle GPS trackers which support 3G and 4G/LTE
Mictrack apparently also has an API with “open protocol can integrate to any third platform” though most of the documentation seems to be in Chinese:
Any chance these GPS tracking products could be made compatible with Home Assistant without having to use a third-party platform that cost money?
Official store on Aliexpress
PS: I am not a reseller and am in no way an affiliated with Mictrack or any of its partners.