There are many ways to create 'no heat curls'. This is my way of doing it. And it works in my hair :) My hair is thick, long, naturally wavy and of a course texture. My hair straightens with a flat iron, however curling my hair DOES NOT WORK. Which is a bummer :\ My hair is naturally beachy-waves. It doesn't look very nice without a few squirts of hairspray though.
Fishtail braid tutorial
2 choices: Leave braid in all day and sleep with it over night, or shower at night and take out the braid in the morning. I usually shower before bed and then sleep with the braid in. Hope this works if you ever try it :)