Around 7 years ago I had a Galaxy S2 on Sprint (CDMA) and home internet via ClearWire. Sprint and Clear both used the same WiMax network (same cell towers) for

Around 7 years ago I had a Galaxy S2 on Sprint (CDMA) and home internet via ClearWire. Sprint and Clear both used the same WiMax network (same cell towers) for '4G.' My phone was rooted so I could mess around with some normally locked settings, and at some point phone service for my S2 was cancelled. One day I changed the APNs (which virtual network the phone connects to via its radio) from the default Sprint ones to the Clear ones, and also changed the MAC address (might not be the exact term, but WiMax 4G was basically long-range WiFi and so the device had a sort of MAC address). Even though my phone's service had been cancelled, I was able to use internet from the Clearwire plan. Of course no phone calls / text messages. It worked as long as I was at home - I think they both connected to the same cell tower and so couldn't be distinguished.