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If you want to take a photo using your iPhone’s camera and then add it to an existing contact, tap on the Camera app. Aim the camera and take a photo of your contact by tapping the camera shutter button at the bottom center of the screen (or press the Volume Up button on the side of your iPhone). You’ll hear the shutter sound to let you know the photo has been taken. To see the photo you just took, just swipe to the right. Tap on the photo, and a row of buttons appears along the bottom of the screen. Tap the button that looks like a box with an arrow coming out of it and a menu will pop up. To assign this photo to a contact, tap the Assign to Contact button, and it brings up your contacts list. Tap on the contact you want to assign that photo to, and it shows you how the final photo is going to look when the contact calls, so you can move and scale it the way you want (using your finger to slide the photo around onscreen, which basically crops the photo, or “pinching it” with your fingers to scale it up or down). When it looks good to you, press the gray Set Photo button and you’re done.