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I have been working for hours to solve this problem.

enter image description here

As you see above, I got CMS error 321

explanation of the eror code 321

The memory/message storage index assigned to the AT command is invalid.

source: http://www.developershome.com/sms/resultCodes2.asp

With that code, I wanted to get message count, and to read sms and I got the same error..

I can send sms with AT commands but I want to read sms from mobil phone. I connected via usb and bluetooth, and the result is the same.. I can send sms but cant read sms ..

What is the wrong on it?

For reading sms I use that code

AT+CMGL="ALL" or "REAC UNREAD" .. etc.

I've used Samsung Galaxy S I9000 and HTC Evo 3d

ertan2002
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2 Answers2

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I know this is old but... I see you used AT+CPMS="SM" so you are trying to read messages from the SIM card. It appears you may be looking to a folder that is empty. Have you tried all of the other storages where the messages may have arrived? Those are detailed in your screen capture (AT+CPMS=?)

At this point I think you have already solved that.

Manuel
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Here's the link from where you can search your error and came to know about the reason/logic behind the error: http://www.developershome.com/sms/resultCodes2.asp#16.2.1.1.Table of +CMS Error Codes and Their Meanings|outline

From there, we know that the read message operation failed because an invalid memory index was assigned to the AT command +CMGL. Note that after the occurrence of a +CMS error, the GSM/GPRS modem or mobile phone will not process the remaining AT commands in the command line.

Muhammad Adil
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