The tide has been running against mobile infrastructure competition in the 5G era as operators seek to contain costs and accelerate roll-out by sharing equipment and even spectrum in many cases. The recent action by the Australian Competition and Consumer Commission (ACCC) to block an infrastructure and spectrum sharing agreement between Telstra and TPG, the country’s two largest MNOs, therefore seems to run against that grain. The move had certainly not been anticipated by either operator when they announced their proposed agreement in February 2022 with the supposition that ACCC approval would be a formality to be followed by execution of the sharing agreement at the end of the year. The two carriers had struck a 10-year regional commercial agreement under…