3-digit Mobile Country Code, 0..999, INT_MAX if unknown.
2 or 3-digit Mobile Network Code, 0..999, INT_MAX if unknown.
16-bit Location Area Code, 0..65535, INT_MAX if unknown.
16-bit GSM Cell Identity described in TS 27.007, 0..65535, INT_MAX if unknown.
Valid values are 0-31 as defined in TS 27.007 8.5, 99 if unknown.
Bit error rate 0-7 as defined in TS 27.007 8.5, 99 if unknown.