How do you block your phone number so the person doesn't know it's you calling?
On an iPhone, you can turn off your outgoing caller ID (under Settings, Phone) if your provider allows it. Some other phones have this feature as well.
Put *67 and then what ever your phone number is.
Or get an iPhone n get the app talk n text it gives u another number that they won't recognize
Before you dial their number, dial *67 (or 1167 if you're using a rotary phone)..