The two major categories of wireless Internet access are Wi-Fi local area networks (LANs) and cellular wide area networks (WANs). In a nutshell, Wi-Fi reception is within a Wi-Fi hotspot, which ...

cellular service can be added to laptops by plugging in a USB dongle (see cellular modem). On tablets, Wi-Fi is standard equipment, but tablets can also be purchased with a built-in cellular modem ...

The latest is the TTGO T-Call, an ESP32 breakout board that also has a cellular modem. Yes ... Add to this WiFi and Bluetooth, and you have a capable microcontroller platform.