ringtone (of mobile phones, portable phones, cellphones, etc.)
 (television, radio, etc.) receiver
 (radio, TV) license fee;  licence fee
 receiver;  receiving set;  receiving apparatus (equipment)
 receiver;  receiving entity
 (quality of) signal reception
 receive only;  RO;  incoming calls only (telephone)
 mobile reception (of a signal)
 recipient (of email, e.g.)
 non-receipt notification request indication