Phonestalker
A person who constantly, or frequently calls a person without said person's consent, much to the person's dismay. This could be due to the fact that gas prices are going up, that the person is scared to follow you, that the person MUST use all their minutes so they don't expire, or that your voice on the phone just turns 'em on. 
"Phonestalker."
"I'M NOT A PHONESTALKER! I ran out of minutes anyway..."
"I'm saved!"