Hi I have the Samsung Galaxy S4 and have had it for just over a week now and I downloaded some apps on the phone from the google play store that cost money but not once was I asked for a credit card of any sort on file and this is my first time using google play store. Does this mean they will bill me for these apps to my next Verizon Wireless bill? Or how does that work? I just wasn't sure how that works for apps or why I was able to download apps that cost money for free.