We've seen some DIY 2G networks over the years, but the 4G field has been relatively barren. It turns out that there is an open source package called srsRAN that allows you to use an SDR to set up an LTE network
https://hackaday.com/2024/03/03/building-your-own-4g-lte-base-station/
Your own mobile operator
https://habr.com/ru/companies/timeweb/articles/708804/
Your own mobile internet. Launch of a 4G LTE base station
This is awesome. I am happy people are figuring this stuff out.
Have you successfully tried this setup?
I haven't done it yet, but I plan to soon