in some places this works even when the budget literally zero. that is without any money i can call someone, and let it ring until i get the message that i don'

in some places this works even when the budget literally zero. that is without any money i can call someone, and let it ring until i get the message that i don't have enough money. but the receiver gets the ring and can call back. it makes sense, because it will encourage someone to spend money to make a call.