Most Helpful Girl
I'm more likely to give you my kik or nextplus number than I am to give you my phone number. I think my phone number is just a little more intimate than my kik (which only strangers communicate with me on) or my nextplus (which my family and friends use to talk to me sometimes, and I'll occasionally give out to a very rare few people I meet online).
Most Helpful Guy
It is, I don't want to be bothered by anyone not extremely close to me. Even casual friends/ acquaintances I'd rather give them my snapchat or something than my number.