AT^SYSINFO is used to get the system information.
: System service state. The values are as follows:
0 No service.
1 Restricted service
2 Valid service
3 Restricted regional service.
4 Power-saving and deep sleep state
: System service domain. The values are as follows:
0 No service.
1 Only CS service
2 Only PS service
3 PS+CS service
4 CS and PS not registered, searching
: Roaming status. The values are as follows:
0 Non roaming state
1 Roaming state
: System mode. The values are as follows:
0 No service.
1 AMPS mode (not in use currently)
2 CDMAmode (not in use currently)
HUAWEI UMTS Datacard/Modem AT Command Interface Specification Confidential
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3 GSM/GPRS mode
4 HDR mode
5 WCDMA mode
6 GPS mode
7 GSM/WCDMA
8 CDMA/HDR HYBRID (Not support)
15 TD-SCDMA mode
: SIM card state. The values are as follows:
0 Invalid USIM card state or pin code locked
1 Valid USIM card state
2 USIM is invalid in case of CS
3 USIM is invalid in case of PS
4 USIM is invalid in case of either CS or PS
255 USIM card is not existent,
?reserved. E618 used it to indicate the simlock state.
?System sub mode, the values are as follows:
0: No service
1: GSM mode
2: GPRS mode
3: EDGE mode
4: WCDMA mode
5: HSDPA mode
6: HSUPA mode
7: HSDPA mode and HSUPA mode
8: TD_SCDMA mode
9: HSPA+ mode
17: HSPA+(64QAM) mode
18: HSPA+(MIMO) mode

//Get the system info
//2 - Valid service, 3 - PS+CS service, 1 - Roaming, 3- GSM/GPRS mode, 1 - pin code locked, 2 - EDGE mode
AT^SYSINFO

^SYSINFO:2,3,1,3,1,,3

OK