imagine a friend of yours said, i was at your home and you werent there, sorry is shouldnt look but i look at the bill. Well, because i'm your friend, i;m gonna pay that bill. so, how would you feel?
it all depends on how big the bill is.
1. if only your last month phone bill, your response would prob "well, thank you". but if that was a 7 years debt, you will bow down, kiss his feet and be thankful beyond imagination.
all depend on how costly it was to the payer.