routing area code (one byte) in hexadecimal format
Routing Area Code when <AcT>=0 or 2
Mobile Management Entity code when <AcT>=7
<lac>, <ci>, <AcT>, and <rac> network information is reported by
URC only if <mode>=2, and the module is registered on some
network cell.
<lac> and <rac> values will change <tac> and <mme_code> values
in LTE.
AT+CGREG?
Read command returns the current value of <mode>, the registration
status <stat>, and the network information (<lac>, <ci>, <AcT>, and <rac> )
according to the used <mode> parameter value.
+CGREG: <mode>,<stat>[,<lac>,<ci>[,<AcT>,<rac>]]
<lac>, <ci>, <AcT>, and <rac> network information is reported only if
<mode>=2 or 4 and the module is registered on some network cell.
<lac> and<rac> values will change <tac> and <mme_code> values in LTE.