Current idle digital mode:
unknown(1) - service is unknown
noService(2) - no service
amps(3) - Advanced Mobile Phone Service (AMPS)
cdma(4) - Code Division Multiple Access (CDMA)
gsm(5) - Global System for Mobile communications (GSM)
hdr(6) - High Data Rate (HDR)
wcdma(7) - Wideband Code-Division Multiple-Access (WCDMA)
gps(8) - Global Positioning System (GPS)
lte(9) - Long Term Evolution (LTE)