> I've been trying to change the message format (AT+CMGF) from
> PDU to Text on my SonyEricsson T230, but I only get the error
> "CMS Error 302". Could anyone please help me? I write
> "at+cmgf=1" and get the error "CMS Error 302".
A result of "+CMS ERROR: 302" decodes to "operation not allowed"
(GSM 07.05, clause 3.2.5).
What does the test command
AT+CMGF=?
return? If there's no "1" in the result from this test command,
then text-mode isn't supported by the phone (GSM 07.05, clause
3.2.3 and GSM 07.07, clause 4.1).
John