How to trick Find My iPhone?

I'm almost 18 and my parents have now gone psycho and put a tracker in my phone, but since i'm not yet 18 or paying the phone bill, they can.

They're using Find My iPhone, and if i try to turn it off on iCloud, they will know. I have thought of everything like signing out on the computers, and even making a new apple ID.

Now i know everyone has lied to their parents, so i don't want to hear anything about obedience or ethics, I'm just looking for a way to trip up the tracker so it says its where I say I'm, even if i'm not. Any suggestions?

Maybe jailbreak your phone and something will be there

Buy a cheap prepaid phone and leave the iphone at home.

Just turn off location service's when you don't want them to know where you are.

go into settings
privacy
location services
slide it to off

that should do it
not positive though, haven't tested it but that should do it

How can I turn off location services without them knowing?