A
to phone someone after they phoned you, to return a phone call
to call back
to call someone on the phone
to call up
to end a telephone call by putting the phone down, by breaking the connection
to hang up
to answer the phone
to pick up
to wait for a short time (INFORMAL)
to hang on
to end a call abruptly, rudely
to hang up (on someone)
to connect by phone, to transfer a call
to put through
to wait for a short time (not informal)
to hold on
to connect using the power button, to activate
to turn on / to switch on
to telephone someone LATER, to return a call LATER, to call back LATER
to get back to (someone)
to disconnect using the power button, to deactivate
to turn off/to switch off
to speak louder
to speak up
to be connected to a place, to someone by telephone
to get through
to give somebody the telephone so that they can talk to the person at the other end
to put on
to finish talking on the phone
to get off (the phone)
to communicate (to convey) a message to someone else
to pass on (a message)
to become inaudible over the (mobile) phone (usually because of a bad connection)
to break up
to call in by telephone to a central point or to a central person
to phone in
to be disconnected abruptly during a telephone conversation
to (be) cut off
to listen to, to check your messages on your voicemail
to pick up (your messages)