if a status report is stored, then the unsolicited result code, described in
Additional info section, is sent.
TA buffer of unsolicited result codes defined within this command is flushed
to the TE when <mode>=1..3 is entered (OK response shall be given
before flushing the codes)
TA buffer of unsolicited result codes defined within this command is cleared
when <mode>=1..3 is entered.
<mt>=2:
PDU mode
+CMT: <alpha>,<length><CR><LF><PDU>
TEXT mode
+CMT:<oa>,<alpha>,<scts>[,<tooa>,<fo>,<pid>,<dcs>,<sca>,<tosca>,<length>]<CR><LF>
<data>
The parameters written in italics will be present depending on +CSDH last setting.
Class 2 messages and messages in the message waiting indication group (stored message)
result in indication as defined in <mt>=1.
Acknowledge for the received SMS-DELIVER SM is sent to network immediately when +CSMS
<service> is set to '0' or when +CSMS <service> is set to '1', acknowledge is sent via +CNMA
command during predefine time-out, an error is sent to network in case timeout expire, next
+CMT response is depend on acknowledge of current received +CMT response in case
+CSMS <service> parameter set to '1'.