Sierra MC8092
=============
No LTE, only WCDMA

AT!GETRAT?
AT!GETBAND?
AT!GSMINFO?
AT!GSTATUS?
AT!SELRAT?

see also:
AT!ENTERCND="A710"
AT!BAND?
AT!BAND=?
AT!GBAND?
AT!GBAND=?


Quectel EC25
============
= LTE CAT4, WCDMA DC-HSDPA, in bands 1,3,7,8,20.

AT+QCOPS?       # trailing 7 = LTE
AT$QCSYSMODE
at+qnwinfo          # says LTE or WCDMA verbosely
AT+QENG="servingcell"
AT+QENG="neighbourcell"

# for LTE:
"servingcell",<state>,"LTE",<is_tdd>,
     <mcc>,<mnc>,<cellid>,<pcid>,
     <earfcn>,<freq_band_ind>,      # !!!
     <ul_bandwidth>,<dl_bandwidth>,
     <tac>,<rsrp>,<rsrq>,<rssi>,<sinr>,<srxlev>

# for UMTS:
"servingcell",<state>,"WCDMA",
     <mcc>,<mnc>,<lac>,<cellid>,
     <uarfcn>,
     <psc>,<rac>,<rscp>,<ecio>,<phych>,
     <sf>,<slot>,<speech_code>,<comMod>

ul_bandwidth / dl_bandwidth (LTE):
0 = 1.4 MHz
1 = 3 MHz
2 = 5 MHz
3 = 10 MHz
4 = 15 MHz
5 = 20 MHz

see also:
at+qcfg="nwscanmode"
at+qcfg="nwscanmodeex"
at+qcfg="nwscanseq"
at+QCFG="band"
at+qcfg=?


Telit LE910-EUG   
===============
= LTE CAT1, bands 3,7,20 only. Band 1 UMTS only (WCDMA/HSPA).
(LE910-EU V2 or LE910-EU1 have LTE in bands 1,3,7,8,20)


AT+COPS?      (generic GSM command actually)
AT#MONI
AT#SERVINFO   (EARFCN around 6200 = band 20)
AT#RFSTS
AT#PSNT?      (0,4 = unsolicited msgs disabled, 4 for LTE (3=HSPA,2=WCDMA,1=EDGE,0=GPRS)
AT#BND?       (LTE band 3,7,20 fixed? No band 1 !?)
AT#CSURV      (wait a few minutes for results)
(AT#CSURVEXT? - probably irrelevant)


Huawei
======
= LTE CAT3, WCDMA, DC-HSDPA, all relevant bands (EU)
No way to inquire the ARFCN and band?

AT^SYSINFOEX
(AT^SYSCFGEX?)

AT+COPS?
+COPS: 0,0,"T-Mobile CZ",7

AT+CREG?
+CREG: 2,1,"FFFE","644070B",7
= ordinal number, status, LAC, CID, access technology

In both commands,the trailing '7' signals LTE mode.
Possible modes:
  0 ... GERAN (GPRS)
  1 ... (obscure and unsupported)
  2 ... UTRAN = basic UMTS = WCDMA
  3 ... GERAN+EGPRS = EDGE
  4 ... UTRAN+HSDPA
  5 ... UTRAN+HSUPA
  6 ... UTRAN+HSDPA+HSUPA
  7 ... E-UTRA = LTE

AT^HCSQ?
(the result contains RAN name followed by RSSI, -120 dB + <n>)

AT^SYSMODE - works but lies