SIMCOM SIM68D
http://mt-system.ru/sites/default/files/documents/sim68d_hardware_design_v1.03.pdf
Quectel
https://www.quectel.com/product/list/GNSSIoTModule.htm
SIMCOM SIM68D
http://mt-system.ru/sites/default/files/documents/sim68d_hardware_design_v1.03.pdf
Quectel
https://www.quectel.com/product/list/GNSSIoTModule.htm