Adafruit's Feather 32u4 FONA has cellular texting, data, and audio capabilities. The Feather features Atmel's 32u4 and FONA 800 mini-cellular GSM module along with a built-in battery charger and standard battery connector. Standard features include 3.3VDC regulator, 20 GPIO, 10 analog inputs, and 8 PWM outputs. The Adafruit Feather is available at Digi-Key. 🤍🤍digikey.com/product-search/en?keywords=feather%20fona