You need to follow the sequence precisely - disable PIN, restart modem then reconnect and do the rest.
Since the PIN check is already disabled, you need to restart the modem (at+cfun=1,1 or power toggle) then re-test with the remaining commands.
You need to follow the sequence precisely - disable PIN, restart modem then reconnect and do the rest.
Since the PIN check is already disabled, you need to restart the modem (at+cfun=1,1 or power toggle) then re-test with the remaining commands.