hhahahah, my friend used to snatch the phone from his girlfriend during such calls and literally reply with "she's dead" when asked "am i speaking to soandso".

It used to be such a laughter riot when these telecallers rang and the rest of us happened to be at his house. He would put it on speaker and say "she's dead" . Usually the caller would then give up, but sometimes when they prodded, he would follow it up with even funnier stuff like "she had heart disease" or "she struggled for long with "testicular cancer" or something along those lines to intentionally mess with them.