keikoi@KoiSV-HDS:~$ tio /dev/ttyUSB2
[06:44:41.594] tio 3.9
[06:44:41.594] Press ctrl-t q to quit
[06:44:41.597] Connected to /dev/ttyUSB2
ERROR
OK
at+csca?
+CSCA: “00300031003000380030003000310030003500380035”,129
OK
at+csca=“+821080010585”,145
ERROR
at+csca=“+821064055156”,145
ERROR
at+sca
ERROR
at+csca=“+82106
ERROR
at+csca=”+821080010585"
ERROR
at+csca=“01080010585”
ERROR
at+cmgf=
ERROR
at+cmgf?
+CMGF: 0
OK
at+cmgf=1
OK
at+csca=“+821080010585”,145
ERROR
at+csca=“+821080010585”
ERROR
at+cmgf?
+CMGF: 1
OK
at+csca
ERROR
at+csca?
+CSCA: “00300031003000380030003000310030003500380035”,129
OK
at+csca=“”,145
ERROR
at+cfun=1,1
OK
+CREG: 0
[06:47:58.371] Disconnected
[06:47:59.372] Warning: Could not open /dev/ttyUSB2 (No such file or directory)
[06:47:59.372] Waiting for tty device..
[06:48:18.398] Connected to /dev/ttyUSB2
at
OK
at+csca?
+CSCA: “01080010585”,129
OK
at+csca=“+821080010585”,145
OK
at+csca?
+CSCA: “+821080010585”,145
OK
at+cfun=1,1
OK
[06:49:05.618] Disconnected
[06:49:06.619] Warning: Could not open /dev/ttyUSB2 (No such file or directory)
[06:49:06.619] Waiting for tty device..
[06:49:24.644] Connected to /dev/ttyUSB2
at+cmgs=
ERROR
at+cmfg
ERROR
at+cmgf?
+CMGF: 0
OK
at+cmgs=24
079128010810505811000B811060045551F600000B0BC8329BFD061DEBF97908
+CMS ERROR: 350
at+csms?
+CSMS: 0,1,1,1
OK
at+cms
ERROR
at+csms=1
+CSMS: 1,1,1
OK
at+cmgs=24
079128010810505811000B811060045551F600000B0BC8329BFD061DEBF97908
Still not working as well.