From 30 June 2026 a new ACMA industry standard forces Telstra, Optus and TPG to describe mobile coverage with one honest legend: good, moderate, basic or no coverage. It is a genuinely useful change, but a clearer map does not put more bars on your phone. This guide explains what each label really means for a business that runs on mobile, where you can realistically expect a Triple Zero call to connect, and why the smartest response is to stop tying your phones to any single network's coverage.