Sub-GHz spectrum maximizes the cost-effectiveness of covering large, sparsely populated areas with wireless connectivity because of the long ranges of its signals. But even sub-GHz economics can be inadequate to make a strong profit case for operators to deliver universal and high quality rural coverage – so shared networks, for so long anathema to many MNOs (especially if mandated by a government), are becoming more popular. The UK is pushing ahead, at least haltingly, with its Shared Rural Network, and now China is exploring how to open up more of the 700 MHz band for a rural 5G network, probably shared between multiple operators. A paper, issued jointly by the Chinese State Council and Communist Party Central Committee, argues for…