answerphone

area code

battery

business call

cordless phone

country code

directory enquiries

dialing tone

engaged

extension

interference

international directory enquiries

fault

message

off the hook

operator

outside line

personal call

phone (telephone)

phone book / telephone directory

phone box / call box

phone card

phone number (telephone number)

receiver

switchboard

wrong number

mobile

smartphone

missed call

mobile phone charger

ringtone

signal

text message

to call / to phone

to be cut off

to dial a number

to hang up

to leave a message

to ring

to call someone back

to put the phone on loudspeaker