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Adafruit FONA 808 - Mini Cellular GSM + GPS Breakout
The Adafruit FONA 808 combines 2G cellular connectivity with integrated GPS tracking in a compact 1.75 × 1.6-inch breakout. Built around the SIM808 module with an MT3337 GPS chipset, it provides voice calling, SMS, GPRS data, and GPS geolocation — all controlled over a single serial port via AT c...
SIM900 Module - 4 Frequency
The SIM900 is an ultra-compact and reliable quad-band GSM/GPRS module in an SMT package. Built around a powerful single-chip processor with an ARM926EJ-S core, it delivers voice, SMS, data, and fax capabilities in a tiny 24 × 24 × 3 mm form factor weighing just 3.4 g. Operating across the 850/90...
