Answer
to take the call and speak after a phone has rung
Busy
already being used, of a telephone line or number
Caller ID
a facility that identifies and displays the phone numbers of incoming calls made to a particular line.
Charge
to connect a smartphone, tablet computer, digital camera, etc. to an electricity source to add power to its battery
Dial
to press numbers on a landline phone or touch numbers on a smartphone keypad to call someone
to hang up
to end a telephone call
hotspot
a place where people can get Internet access either for free or by using a network access password
landline
a physical telephone line, or a telephone that uses one
line or connection
a telephone connection used to make a voice call
missed call
a call that wasn't answered
pay phone or phone booth
a public telephone that takes coins or phonecard payment for each call made
pick up (the phone)
to answer a landline phone by lifting the receiver or to answer a mobile phone by pressing the green button
receiver
the part of a landline telephone set you pick up and speak into
return a call or call someone back
to telephone someone who tried to telephone you
ring
(of a telephone) to make the sound that tells you someone is calling
robocall
an automatic call that plays a recorded message, usually to sell something or get votes in an election
