A few telephones have the letter buttons "A" "B" "C" and "D". They also make different DTMF sounds.
ʌ WORD_BOUNDARY f j uː WORD_BOUNDARY t ɛ l ɪ f oʊ n z WORD_BOUNDARY h æ v WORD_BOUNDARY ð ə WORD_BOUNDARY l ɛ t ə ɹ WORD_BOUNDARY b ʌ t ə n z WORD_BOUNDARY ʌ WORD_BOUNDARY b iː WORD_BOUNDARY s iː WORD_BOUNDARY æ n d WORD_BOUNDARY d iː WORD_BOUNDARY ð eɪ WORD_BOUNDARY ɔ l s oʊ WORD_BOUNDARY m eɪ k WORD_BOUNDARY d ɪ f ɹ ə n t WORD_BOUNDARY d iː t iː ɛ m ɛ f WORD_BOUNDARY s aʊ n d z WORD_BOUNDARY