lowercase trans lesbian. queen of the stone age. makes (& makes love to) weird music, weird games, and weird women
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Whoa, that's so cool! How were you able to make this? I'd love to try and make one, too!
So, I used a bladeRF 2.0 micro xA4 (I suspect you could do it with a cheaper software-defined radio, like one of those LimeSDRs, but this is what I have) and some open source software for this situation (I have been following https://github.com/Nuand/bladeRF/wiki/Setting-up-Yate-and-YateBTS-with-the-bladeRF, but I suspect https://hernan.de/blog/creating-a-cellular-testbed-with-yatebts-and-srslte/ is a better tutorial)
Oh, and some SIM cards, either the cheap "16-in-1 magicSIM" things or the fancy hackable ones from Osmocom.