Error in reading message from mobile using AT commands

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Hi,I have a sony erriccson k550i mobile connected with my laptop. I am using AT commads to interact with mobile.

When i am trying to change my mobile msg mode from PDU mode to Text mode using an AT command AT+CMGF=1,It returns a error message as +CMS ERROR 303.

how can i solve this problem?
please help me..............

Ya , i am tryying the command AT+CMGF=?. it returns (0,1).
when i give AT+CMGF=0 then it retutns OK.but it only returns error for AT+CMGF=1.

Posted 21-Jan-10 18:38pm

Muthamizhselvan.ram

Updated 21-Jan-10 23:49pm

v2

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Ankur^\m/ · Answer 1 · 2010-01-21T20:47:00

Revised (Ver. 2):
The information response "+CMGF: (0,1)" indicates that your phone supports both PDU mode and text mode.
It should work in Text mode as well.

Try checking your phone's functionality level using:

AT+CFUN=?

Set it to 1 for full functionality
Also check if requires PIN.
I am not very sure if these restrict changing the SMS mode, but try it once and let me know if it solves the problem.

-----
(Ver 1):
Error 303 means, the operation is not supported.
Try this first

AT+CMGF=?

This will tell you supported modes.
If the ans is (0,1) both the modes are supported.

I think your phone does not support text mode, U will have to work with PDU mode.

Hope this helps!!
Ankur Mundhra