When this happens, did you observe that you are in locations where there is poor signal?
Can you use the fllowing command to force it in 4G mode?
AT+QCFG="nwscanmode",3,1
When this happens, did you observe that you are in locations where there is poor signal?
Can you use the fllowing command to force it in 4G mode?
AT+QCFG="nwscanmode",3,1