SIM808 GPRS/GSM+GPS Shield is a GSM and GPS two-in-one function module. It is based on the latest GSM/GPS module SIM808 from SIMCOM, supports GSM/GPRS Quad-Band network and combines GPS technology for satellite navigation.It has high GPS receive sensitivity with 22 tracking and 66 acquisition receiver channels.It has tandard 4-pole TRRS headphone jack so that you can use any 'Android' or 'iPhone'-compatible headset with mic. Also breakouts for external 32Ω speaker and electret mic if you don't want to use a headphone
This module can do just about everything, like make and receive voice calls using a headset or an external 32Ω speaker+electret microphone, send and receive SMS messages or send and receive GPRS data (TCP/IP, HTTP, etc.).
Now we has developed a new function for this board, it's become a GSM/GPS/Bluetooth three-in-one function module now. We improve our versions by upgrading bluetooth firmware. The new AT command for bluetooth also has been upgraded in the wiki.
And if you want to update your old version sim808 shield, we also provide tutorial and component / antenna that you need.