List of mobile network operators
United States
Networks
Coverage map (very optimistic) provided by OpenSignal. In general Verizon has the best coverage, followed by AT&T, T-Mobile, with Sprint far behind. Where I need it, Verizon works best.
List of MVNOs
Austria
Networks
OpenSignal also provides a coverage map. As a general idea A1 has the best coverage, especially in rural areas, followed by Drei (slightly worse), and T-Mobile (not too bad).
List of MVNOs
See the LTE-Forum.
