Hi friends…
I have a Qualcomm Quectel EC25 modem and I want to lock on a specific MNC without/with sim. I use the following AT-Command:
AT+COPS=0,0,"OP1* OP1*",0
or
AT+COPS=0,0,"OP1* OP1*",2
or
AT+COPS=0,0,"OP1* OP1*",7
or
AT+COPS=0,2,"4***",2
or
AT+COPS=1,0,"OP1* OP1*",0
or
AT+COPS=1,0,"OP1* OP1*",2
or
AT+COPS=1,0,"OP1* OP1*",7
or
AT+COPS=1,2,"4***",2
or
AT+COPS=1,2,"4***",0
or
The above commands usually returns OK but no change occurs and the previous operator is still selected. Do I have to execute another command(s) too?