Detailed Introduce：
                   2010-2025MHz band
                   · Compliant to 3GPP class B (24dBm)
                   · Dimensions: 34.7mmX54.1mmX3.0mm
                   · Weight: 11g
                   · Control via AT commands (GSM 07.07, 07.05 and SIMCom enhanced AT
                    Commands)
                   · SIM application toolkit
                   · Supply voltage range: 3.4V to 4.5V
                   · Low power consumption
                   · Normal operation temperature:
                   -20 °C to +55 °C
                   · Restricted operation temperature:
                   -30 °C to -20 °C and +55 °C to +80 °C
                   · Storage temperature
                   -40 °C to +85 °C