I have 2 gprs/gsm modems with me at the moment one of them is huawei and the other is a prolink modem. I have no problem sending or receiving SMSes via AT Commands. However I am trying to receive automatic notification using this command AT+CNMI and I am not able to get it to work but when I try this command the modem replies with ok with no errors.
Procedures that I have performed so far
I managed to figure out the problem already :) . Basically the modem that i used makes use of several different ports and the new message notification will be received by another port. Problem solved.