The M8321M with Communication Modules/GNSS Modules LCC RoHS manufactured by Chinamobile is a 4G LTE CatM1 (eMTC)/NB-IoT/GSM/GNSS communication module. It is a single-mode module with integrated voice and GNSS features. The module is power-efficient and provides ultra-low-power consumption, making it suitable for a wide range of IoT applications. This module also features VoLTE, CSFB, and SRVCC, making it ideal for use in mobile phones. This module is compliant with 3GPP standards and is also RoHS compliant. Additionally, it supports eDRX, PSM, and DTX, enabling it to run applications long battery life.