The latest mobile network performance metrics drill down deeper than ever, raising the question of which ones matter most to users and so make the biggest difference to customer loyalty and churn. The USA has been especially well analyzed and the latest results from two of the leading mobile analytics firms, Ookla and Opensignal, hold plenty of interest. They range beyond the mobile networks themselves to include some data on relative performances of the handsets. Ookla also glimpses at the chipsets that underly device performance in combination with optimization techniques employed by the service provider. The range of metrics for the networks themselves has also increased, with more detailed measurements of latency, video performance, uplink speeds, and consistency, which all…