Modem: 
CMCC C216B(RDA 8851ES)

Form Factor:
LCC  20.2*22.2*2.5mm

Bands:
GSM: 850/900/1800/1900MHz

Speed: 
GPRS: Multi-slot class 12 (4Rx/2Tx)
Max Downlink 85.6 Kbps

nterfaces:
USIM 1: eSIM for China CMCC
USIM 2: 1.8V/3.0V
UART x 2
Analog Audio x 2

Temperature:
Operating : -40 to +85 ℃
Storage: -40 to +85 ℃

Support OS:
Linux