What curling shampoo works?

Hi, i have strait hair but i want wavy hair. I use garnier fruitis curl and shine system conditioner. It works a little. Should I buy the shampoo for it too, or should i buy a different brand. Also, is their a way i can curl my hair without any iron, beads, brade, etc.What curling shampoo works?
if you hair is really really straight i would be a little hard to get it to curl up. You should try the shampoo for garnier.

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