What happened to Sprint’s plan for nationwide WiMAX coverage?

Nationwide coverage still requires a huge number of terrestrial towers because cellular signals only travel a limited distance, especially at higher frequencies. That’s why replacing every tower with one giant wireless network was never realistic. Satellite-to-phone services may fill coverage gaps, but they currently have limitations such as capacity, device compatibility, messaging-focused features, and the need for a clear view of the sky.

There are also newer versions of the old idea through shared Wi‑Fi networks and fixed-wireless services. Cable companies, for example, let customers connect to networks of public hotspots, but those depend on nearby homes or businesses with wired broadband. They can be useful in populated areas, but they don’t provide true nationwide coverage in remote places.

You’re thinking of WiMAX, not Wi‑Fi. Sprint invested heavily in WiMAX as an early 4G technology, but the rest of the industry largely adopted LTE instead. WiMAX also had weaker indoor performance and limited range in the spectrum Sprint used. Sprint shut down its WiMAX network in 2015, and the investment became a major financial burden before the company was acquired by T‑Mobile.

The radio technology itself wasn’t necessarily useless, but ecosystem support mattered. LTE had broader backing from carriers and equipment manufacturers, so phones and network gear were built around it. Once LTE became the global standard, Sprint’s separate WiMAX network was too costly to maintain and offered fewer compatible devices.