Also band 40 is the only widely supported TDMA in range of the cheaper SDRs. Even a limesdr mini can speak that, though one may want to get an LTE quartz to kee

Also band 40 is the only widely supported TDMA in range of the cheaper SDRs. Even a limesdr mini can speak that, though one may want to get an LTE quartz to keep phase noise in spec (the fraction from the normal quartz has a really big denominator, that makes fractional PLL problematic if you don't sense fractional phase of the reference quartz) with the PLLs on those SDRs.