Specifications:
- Operating Voltage: 3.7V to 5V (depending on the model).
- Frequency Bands: 850/900/1800/1900 MHz (for GSM/GPRS).
- Data Transfer: GPRS (General Packet Radio Service), EDGE, etc.
- Interfaces: UART, RS232, and I2C.
- Power Consumption: 1.5mA in idle mode, 250mA during transmission.
- Communication Protocol: AT commands over UART.
- SIM Card: Mini or Micro SIM.
- Example Models: SIM800, SIM900, A6, A7, and GSM GPRS modules.
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