Crossword clues for Telephone letters:OPERTelephone lettersATTLetters on a telephone billOPER0 letters, on a telephoneONESTelephone numbers without lettersONEIt lacks letters on a telephone keypadONETelephone button without lettersONETelephone key with no lettersONETelephone button without any lettersONETelephone button that lacks lettersONESTelephone buttons that lack lettersONETelephone button that doesn't have letters