Operating Frequency Bands: GSM: 850 MHz, 900 MHz, 1800 MHz, 1900 MHz Communication Protocol: Serial communication (UART interface) AT commands for controlling the module via microcontroller (e.g., Arduino, Raspberry Pi) Power Supply: Input Voltage: 3.4V to 4.4V DC (typically 3.7V) Typical Power Consumption: 1A (during transmission) Standby Mode: Low current consumption (around 10-20mA) Data Transfer: Supports SMS (Short Message Service) Voice call functionality GPRS (General Packet Radio Service) for basic data transfer (supports TCP/IP, HTTP) SMS Capacity: Send/receive SMS with text and numeric encoding Can store up to 100 SMS in memory Call Functionality: Make and receive voice calls Support for hands-free voice interface Ability to control call-related operations using AT commands
