A7683E - Replacement solution for the discontinued SIM800C

The major telecommunications networks in Vietnam are currently in the process of discontinuing the 2G network.

Consequently, there is a growing demand to replace the current GSM SIM800C modules with newer alternatives that offer more optimal pricing. In response to this need, SIMCom has introduced a version of the module that exclusively supports LTE Cat1 (part of the 4G infrastructure), the A7683E.


  • Diverse peripheral integration: SPI, UART, I2C,…
  • Pin compatibility with SIM800C
  • Relatively short lead-time, only 6–8 weeks
  • Optimal cost

Technical Specifications:

  • ARM Cortex R5 core ASR chipset, 624MHz CPU, OS: RTOS
  • Compact size: 15.7 x 17.6mm
  • Peripheral compatibility with SIM800C
  • Category: CAT1 band 1, 3, 5, 7, 8, 20, 28
  • Maximum power consumption of only 700 mA
  • Support for multiple protocols: TCP/IP/HTTP/HTTPS/MQTT/MQTTS,…
  • VoLTE/SMS support


  • Data collection devices
  • IoT devices, smart homes,…
  • IoT applications requiring a small form factor

Contact EPI Vietnam Technologies – the authorized distributor of SIMCom in Vietnam for technical support and samples.