Is turning on personal hotspot free?

I have a Samsung Galaxy Note II on contract (Orange/EE) and iPhone 5 on pay as you go (Orange/EE). I want to turn personal hotspot on so that i could get internet from Galaxy Note II to iPhone via Wi-Fi. But i want to know if it is free.

It uses up your internet - so if you have unlimited internet on you contract; yes it's free. However, if not, you could risk very quickly running over your contract.

NO NO NO! I learned that the hard way lol I went thru 4gb of our data, we only got like 5 or 6 a mth, in less than 30 min! It uses your data FAST!