Quad-band 850/900/1800/1900MHz - connect onto any global GSM network with any 2G SIM (in the USA, T-Mobile is suggested).
Make and receive voice calls using a headset or an external 8Ω speaker and electret microphone.
PWM/Buzzer vibration motor control
AT command interface with "auto baud" detection
Send and receive SMS messages.
Send and receive GPRS data (TCP/IP, HTTP, etc.).
Scan and receive FM radio broadcasts.
Lead out buzzer and vibration motor control port.
AT command interface with "auto baud" detection.
Onboard IPEX socket that can be connected to external antenna.
Breakouts for external 8W speaker and electret mic if you don't want to use a headphone
Level shifting circuitry so you can run it with 2.8V to 5V logic.
Vibrational motor (buzzer) driver so you can have noiseless notifications
uFL or SMA connections for external antenna
Indicator LEDs for power and network connectivity
Standard SIM slides into the back