Okystar OKY3256 is a quad-band GSM/GPRS module with industrial grade certification from Okystar. The module is designed for worldwide use and operates on all four GSM frequency bands (850, 900, 1800 and 1900 MHz) in compliance with 3GPP Release 4. It supports EDGE, EGSM, GPRS and HSCSD data transmission. The dual-SIM version enables simultaneous operation of two SIM cards on the same module. In addition, it also includes a comprehensive software stack that supports TCP/IP, HTTP and e-mail. The module performance is further enhanced with additional features such as Location Based Services (LBS), NITZ time synchronization and more.