Twilio has released Super SIM, a public beta cellular module that allows developers to choose their network providers and monitor data consumption. The Adafruit Feather FONA 32u4, a cellular board based on the Simcom SIM800H modem, is compatible with Super SIM. To use Super SIM with the Feather FONA, users need to set up their firmware and configure the APN settings. Once configured, users can send SMS commands to their device using the Super SIM API and monitor data usage through the Twilio console.