We’ve seen quite a few DIY 2G ... but the 4G field has been relatively barren. Turns out, there’s an open source suite called srsRAN that lets you use an SDR for setting up an LTE network ...
The LTE antenna, combined with a compatible 4G LTE module, allows the device to connect to cellular networks, With 4G LTE, you can build projects that utilize internet access and remote communication.