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I hang up; he hangs up.
I hung up; they hung up.
I shall/will hang up; you will hang up.
you can hang them up when ever you like but the night to hang them up is April 20 :)
Hang You Up was created in 2011.
Yes telemarketers can hang up. Have you ever wondered when you say who they want isn't there, they hang up.
The past tense of hang-up is hung-up.