When a customer purchases a development kit from China and it shall be used in Australia it has been noted that some default parameters set by the development kit manufacturer will affect the performance of the module.
WisLink Cellular BG96 in Australia
For example with the WisLink Cellular BG96 a customer module has been set to NBIOT mode and therefore the BAND was 5.
Use the AT command below to change the work mode and BAND B28:
Set the mode
AT+QCFG="iotopmode",0Set the band
AT+QCFG="band",f,8000000,8000000