TelephonyCollector
Passive collector for SignalCategory.Telephony.
Reports network/SIM operator names and country codes, SIM state, phone type, data network type, active modem count and whether the IMEI is readable via TelephonyManager.
Privacy: carrier/SIM operator and country codes are moderately identifying. Restricted identifiers (IMEI) surface only as readable/blocked rather than the raw value, and no READ_PHONE_STATE permission is used.