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 commands.

The GPS module offers significantly better performance than the FONA 3G's GPS, with −165 dBm tracking sensitivity, 22 tracking / 66 acquisition channels, and a 32-second cold start. The board includes LiPo battery charging, level shifting (2.8–5 V logic), a TRRS headphone jack, vibration motor driver, and uFL antenna connectors for both GSM and GPS antennas.

Key Features

• SIM808 Quad-Band GSM + GPS – 850/900/1800/1900 MHz 2G + integrated MT3337 GPS
• Voice, SMS, and Data – Make/receive calls, send/receive SMS, GPRS data (TCP/IP, HTTP)
• LiPo Battery Charging – On-board charger via Micro-USB; requires 500 mAh+ battery
• Level Shifting – Works with 2.8–5 V logic levels
• uFL Antenna Connectors – Separate uFL ports for GSM and GPS antennas
• TRRS Headphone Jack – Standard 4-pole jack for Android/iPhone-compatible headsets
• Speaker + Mic Breakouts – Pads for external 32 Ω speaker and electret microphone
• Vibration Motor Driver – PWM/buzzer output for silent notifications
• Standard SIM Slot – Accepts a 2G mini SIM card
• AT Command Interface – Auto baud detection; controllable via UART from any 3–5 V microcontroller

GPS Specifications

• Channels: 22 tracking / 66 acquisition
• Signal: GPS L1 C/A code
• Tracking Sensitivity: −165 dBm
• Cold Start Sensitivity: −147 dBm
• TTFF Cold Start: ~32 s typical
• TTFF Warm Start: ~5 s typical
• TTFF Hot Start: ~1 s typical
• Accuracy: ~2.5 m

Also Available

• FONA 808 Shield – GSM + GPS for Arduino (shield form factor)
• FONA 800 Shield (without GPS)
• FONA Mini Cellular GSM Breakout – uFL Version (without GPS)
• FONA 3G – European Version (3G + GPS)

Required Accessories (Not Included)

• 2G mini SIM card
• LiPo battery – 500 mAh or larger
• Micro-USB cable for charging
• External uFL GSM antenna
• External uFL passive GPS antenna

Ideal For

• GPS asset tracking and geolocation with cellular reporting
• IoT projects requiring 2G data + GPS
• Voice and SMS-enabled embedded devices
• Remote monitoring and telemetry

Package Contents

• 1× Adafruit FONA 808 Mini Cellular GSM + GPS Breakout