UPD: Мелодию слышно, но тихо. 50 омный динамик слышно лучше, но тоже гораздо тише чем было SIM900B.
CODE
AT
AT
OK
ATE0
ATE0
OK
AT+MORING=0
OK
AT+GMR
Revision:1137B03SIM900M64_ST_ENHANCE
OK
AT+CMEE=1
OK
AT+CHFA=2
OK
AT+CLVL=100
OK
AT+CRSL=4
OK
AT+CALS=4
OK
AT+CEXTBUT=1
OK
AT+CSMINS?
+CSMINS: 0,1
OK
AT+CPIN?
+CPIN: READY
OK
AT+CREG?
+CREG: 0,1
OK
AT+CSQ
+CSQ: 30,0
OK
AT+COPS=0,2
OK
AT+COPS?
+COPS: 0,2,"25001"
OK
AT+CREG?
+CREG: 0,1
OK
AT+CSQ
+CSQ: 30,0
OK
AT+CSCS="UCS2"
OK
AT+CUSD=1,"002A0031003000300023"
OK
+CUSD: 0,"04110430043B0430043D0441003A00350038002C00330036044000200421043E04320435044
2044B002C043A0430043A002004310440043E044104380442044C0020043A0443044004380442044
C
0020002A003500330035002A0035002300280032002C003700320440002F04340029",72
AT+CPMS?
+CPMS: "SM",0,5,"SM",0,5,"SM",0,5
OK
AT+CIPSTATUS
OK
STATE: IP INITIAL
AT+CIPSHUT
SHUT OK
AT+CIPCSGP=1
OK
AT+CGATT=1
OK
AT+CIPMUX=1
OK
AT+CIPSTATUS
OK
STATE: IP INITIAL
C: 0,,"","","","INITIAL"
C: 1,,"","","","INITIAL"
C: 2,,"","","","INITIAL"
C: 3,,"","","","INITIAL"
C: 4,,"","","","INITIAL"
C: 5,,"","","","INITIAL"
C: 6,,"","","","INITIAL"
C: 7,,"","","","INITIAL"
AT+CSTT="internet.mts.ru","mts","mts"
OK
AT+CIPSTATUS
OK
STATE: IP START
C: 0,,"","","","INITIAL"
C: 1,,"","","","INITIAL"
C: 2,,"","","","INITIAL"
C: 3,,"","","","INITIAL"
C: 4,,"","","","INITIAL"
C: 5,,"","","","INITIAL"
C: 6,,"","","","INITIAL"
C: 7,,"","","","INITIAL"
AT+CIICR
OK
AT+CIPSTATUS
OK
STATE: IP GPRSACT
C: 0,,"","","","INITIAL"
C: 1,,"","","","INITIAL"
C: 2,,"","","","INITIAL"
C: 3,,"","","","INITIAL"
C: 4,,"","","","INITIAL"
C: 5,,"","","","INITIAL"
C: 6,,"","","","INITIAL"
C: 7,,"","","","INITIAL"
AT+CIFSR
10.54.49.170
AT+CDNSCFG="208.67.222.222","208.67.222.222"
OK
RING
AT+CLCC
+CLCC: 1,1,4,0,0,"+7988888888",145,""
OK
NO CARRIER
AT+CLCC
OK