Two things to check:
1) is the SIM correctly inserted?
I guess yes, since we do get the output of AT&V.
Anyways, I rebooted. Same result as follows ::
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Welcome to minicom 2.5
OPTIONS: I18n
Compiled on Feb 24 2011, 11:25:55.
Port /dev/ttyUSB0
Press CTRL-A Z for help on special keys
AT S7=45 S0=0 L1 V1 X4 &c1 E1 Q0
OK
AT&V
&C: 1; &D: 2; &F: 0; E: 1; L: 1; M: 0; Q: 0; V: 1; X: 4; Z: 0; S0: 0;
S3: 13; S4: 10; S5: 8; S6: 2; S7: 45; S8: 2; S9: 6; S10: 14; S11: 95;
+FCLASS: 0; +ICF: 3,3; +IFC: 2,2; +IPR: 115200; +DR: 0; +DS: 0,0,2048,6;
+WS46: 12; +CBST: 0,0,1;
+CRLP: (61,61,48,6,0),(61,61,48,6,1),(240,240,52,6,2);
+CV120: 1,1,1,0,0,0; +CHSN: 0,0,0,0; +CSSN: 0,0; +CREG: 0; +CGREG: 0;
+CFUN:; +CSCS: "IRA"; +CSTA: 129; +CR: 0; +CRC: 0; +CMEE: 0; +CGDCONT: (1,"IP","","0.0.0.0",0,0),(2,"IP","Ceibal","0.0.0.0",0,0),(3,"IP","gprs.ancel1","0.0.0.0",0,0),()
; +CGDSCONT: ; +CGTFT: ; +CGEQREQ: (1,2,0,0,0,0,2,0,"0E0","0E0",3,0,0),(2,2,0,0,0,0,2,0,"0E0","0E0",3,0,0),(3,2,0,0,0,0,2,0,"0E0","0E0",3,0,0),(4,2,0,0,0,0,2,0,"0E0",")
; +CGEQMIN: ; +CGQREQ: ; +CGQMIN: ; ; +CGEREP: 0,0; +CGCLASS: "A";
+CGSMS: 0; +CSMS: 0; +CMGF: 0; +CSCA: "",; +CSMP: ,,0,0; +CSDH: 0;
+CSCB: 0,"",""; +FDD: 0; +FAR: 0; +FCL: 0; +FIT: 0,0; +ES: ,,;
+ESA: 0,,,,0,0,255,; +CMOD: 0; +CVHU: 1; ; +CPIN: ,; +CMEC: 0,0,0;
+CKPD: 1,1; +CGATT: 0; +CGACT: 0; +CPBS: "SM"; +CPMS: "SM","SM","SM";
+CNMI: 0,0,0,0,0; +CMMS: 2; +FTS: 0; +FRS: 0; +FTH: 3; +FRH: 3; +FTM: 96;
+FRM: 96; +CCUG: 0,0,0; +COPS: 0,2,""; +CUSD: 0; +CAOC: 1; +CCWA: 0;
+CLVL: 2; +CMUT: 0; +CPOL: 0,2,"",0,0,0; +CPLS: 0; +CTZR: 0; +CLIP: 0;
+COLP: 0; +CLIR: 0; ^PORTSEL: 0; ^CPIN: ,; ^ATRECORD: 0;
^FREQLOCK: 10226476,12482272
OK
AT+CLAC
ERROR
AT+CGDCONT=?
ERROR
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2) Is this really a GSM/UMTS modem? What's the brand and model number?
Again, I guess yes.
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-bash-4.1# lsusb
Bus 002 Device 002: ID 12d1:1003 Huawei Technologies Co., Ltd. E220 HSDPA Modem / E230/E270 HSDPA/HSUPA Modem
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 002: ID 1286:2001 Marvell Semiconductor, Inc. 88W8388 802.11a/b/g WLAN
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
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Regards,
Ajay
Dan