“In telecommunications, a femtocell is a small, low-power cellular base station, typically designed for use in a home or small business.”
https://en.wikipedia.org/wiki/Femtocell
“Samsung is a pioneer in network innovation, with a broad portfolio of solutions that provide support for operators, enterprises, and consumers across LTE, Wi-Fi, and 5G. Samsung Networks has achieved numerous “world’s firsts”, from key technologies like carrier aggregation and voice over LTE to the first commercial femtocell, and most recently the first FCC-certified end-to-end 5G products.”
https://www.dossier.org/?p=553