does anybody know why the modem does not support this AT command using an empty user and pwd?
AT$QCPDPP=1,1,““,““
The modem itself returns with an error.
Thanks, I am aware that there are alternatives. But this is provider specific, I guess.
The question was: why does the modem itself does not like the at command?
dummy / dummy as user/pwd works cause the provider (BELL, Canada) does not check it.
But the question remains: why does the modem does not accept the commands?