+CMGR:
<stat>,<fo>,<ct>[,<pid>[,<mn>][,<da>][,<to
da>],<length><CR><LF><cdata>]
If text mode (+CMGF=1) command
execution is successful and CBM storage:
+CMGR:
<stat>,<sn>,<mid>,<dcs>,<page>,<pages
><CR><LF><data>
If text mode (+CMGF=1) command
execution is successful and
SMS-STATUS-REPORT:
+CMGR:
<stat>,<fo>,<mr>[,<ra>][,<tora>],<scts>,<
dt>,<st>
If PDU mode (+CMGF=0) and command
execution is successful:
+CMGR:
<stat>[,<alpha>],<length><CR><LF><pdu
>
otherwise:
+CMS ERROR: <err>