root@armadillo:~# cu -l /dev/ttymxc6 -s 115200
alloc_contig_range: [ac0e0, ac0f4) PFNs busy
Connected.
ATI1
Quectel
EC25
Revision: EC25JFAR06A03M4G_SBK

OK
AT+CMEE=2

OK
AT+CPIN?
+CPIN: READY

OK
AT+CNUM

OK
AT+CSQ 
+CSQ: 24,99

OK
AT+COPS=?
+COPS: (2,"SoftBank","SoftBank","44020",2),(1,"SoftBank","SoftBank","44020",7),(1,"440 00","440 00","44000",7),(3,"440 52","440 52","44052",7),(3,"KDDI","KDDI","44051",7),(3,"KDDI","KDDI","44050",7),(3,"JP DOCOMO","DOCOMO","44010",2),(1,"441 00","441 00","44100",7),(1,"440 05","440 05","44005",7),(3,"JP DOCOMO","DOCOMO","44010",7),(1,"441 91","441 91","44191",7),,(0-4),(0-2)

OK
AT+COPS?
+COPS: 0

OK
~.

Disconnected.
root@armadillo:~#