<lac>, <ci> and <AcT> network information is reported by URC only
if <mode>=2, and the module is registered on some network cell.
AT+CREG?
Read command returns the current value of <mode>, the registration
status <stat>, and the network information (<lac>, <ci> and <AcT>)
according to the used <mode> parameter value.
+CREG: <mode>,<stat>[,<lac>,<ci>[,<AcT>]]
<lac>, <ci>, and <AcT> network information is reported only if <mode>=2
and the module is registered on some network cell.