SIM 900
This is a small GSM Module from SIMCom
More Information you find
GPRS_Shield_V2.0
There is a Datasheet and a update tool for the firmware.
Take a look inside
Flash WR504Ub
GSM Amplifier RF7166
GSM Baseband
Could be a Processor a PNX4900 ???
32-bit ARM926EJ-S
8 kB Instruction RAM 32 Bit (I-TCM),
8 kB Data RAM (D-TCM)
DSP subsystem
Ceva-Teak
16-bit fixed-point DSP
Aero 4210 RF subsystem
RF subsystem
Dualband LNA inputs
GSM 850 or E-GSM 900
DCS 1800 or PCS 1900
