If you have the confidence and charisma to speak to women then you can get their phone number the old fashioned way, but if you lack self confidence, or you're a creepo, then you can just buy a random girl's number out of a vending machine! Phone chat is a big business in Japan, and the phone numbers sold in vending machines really work, although you may end up paying more money for the privilege of speaking to a real live girl on a chat line. But hey- if you're lonely enough to buy a girl's phone number from a vending machine then you probably won't mind paying a little extra to chat with her, right?