what are the return of the following?
AT+Cpin?
AT+KSIMSEL?
ati3
at+ksrat?
AT+KBNDCFG?
at+cgdcont?
Did you compare the APN with the working devices?
BTW, you can also see here:
what are the return of the following?
AT+Cpin?
AT+KSIMSEL?
ati3
at+ksrat?
AT+KBNDCFG?
at+cgdcont?
Did you compare the APN with the working devices?
BTW, you can also see here: