Does enabling Track my Iphone increase my phone bill?

I have prepaid. A few days ago, I got some credit but it simply disappeared, and I hardly did anything! I think enabling Location Services might have something to do with it. What do you think? What could be the reasons?

No unless you aren't paying for 3G or 4G or whatever internet service you have/would have. Unless you don't have unlimited, then keep location off because it uses data constantly