It depends.
If you want something done fast or you have something important to say you're obviously going to call, but if you're just bored and want to chat you're going to text.
Texting for me. But when a friend doesn't get what I say after a few attempts of explaining it in text, I call him and the first sentence he's gonna here is "you stupid bitch"
texting, actually hate calling someone i hate how quickly it can get so awkward if yu run out of things to say and texting is just easier for me in that respect
Texting, I HATE calling, and if one of my friends tries calling me I ignore it and text them. I only talk to family over the phone or older people who aren't into texting.