[epcoa]

That "modem" is usually just called a router or residential gateway, as it is just plain Ethernet, WLAN tied together with some low cost SoC running Linux, in other words just like any other Wifi router you can pick up at a big box store. In AT&T's case, the keys were a cinch to pull from the device and you can run openwrt or pfsense or whatever on your own hardware, you don't even need to use it. Calling it a modem confuses the issue.