Keep your number. Decline a caller you don't know, and they hear your price per minute. If they want you, they pay. If not, they hang up.
Nothing to install on the caller's end. It all happens on a normal phone call.
Telemarketers, solicitors, the cousin who only calls for money. Name your price and let them decide.
Three choices on every call, and two lists that do the rest.
Family and anyone you add are never asked to pay. If you miss them, they leave a free message.
One tap on any number in your call log and it never gets through again.
A caller only pays once you press 1 and start talking. Your voicemail never bills anyone.