This read-only enumeration reports which digital technology the modem is currently idling on, spanning legacy amps(3) and cdma(4) through gsm(5), hdr(6), wcdma(7), and lte(9), plus gps(8) and noService(2)/unknown(1). An admin can use this broad mode indicator to see exactly which radio technology a multi-mode modem has settled on while not actively transferring data, useful for confirming it's idling on the expected high-speed technology rather than an older fallback. For example, a modem expected to idle on lte(9) that instead consistently shows cdma(4) would tell the admin the device isn't getting LTE coverage at that location and is falling back to an older network.