I have a Samsung galaxy s3 and so does my dad. my mom recently got wifi tether on here phone and she pays more per month. I was curious so I tried turning wifi tether on yesterday to see what it would say (if it would say I needed X plan or there was additional charges). it didn't say anything though. it didn't warn me of additional charges or data charges it just turned on. I did this with same result on my dads phone. I was just wondering why can I turn it on and it goes to a screen that says tethering will use your phones data (witch I have unlimited) and it turns on. will I get charged even if it doesn't warn or tell me anything other then data charges? and why can I turn it on in the first place?