If you have a photo assigned to a contact on the iPhone, the photo will pop up and fill the entire screen when the contact calls you. The feature is useful for quick at-a-glance recognition of callers and is something fun and special to do for your favorite people.
To add a photo, you’ll first need to get the photo onto the iPhone. Here are instructions on how to do this. If the person is in photo range, you can also snap a quick picture using the iPhone’s camera.
If the photo is already on your iPhone, follow the instructions below.
Instructions for Adding Photos to iPhone Contacts:
1. Tap on the Contacts app, or tap Contacts in the Phone app:

2. Scroll to the person or business you want to add the photo to, and tap their name.
3. Tap Edit in the top right corner:

4. Tap Add Photo.

5. Tap Choose Existing Photo if you have a photo on your iPhone that you want to use. Or, tap Take Photo if the person is in photo range:

6. Selecting Choose Exising Photo will open up the iPhone’s Photo Albums. Navigate through your pictures and select the one you want.
7. You can edit the size and orientation of the photo. This comes in handy if you want to use just the face of a person, or if there are multiple people in a photo. You edit by zooming in and out using pinching gestures or by dragging the photo left, right, up, or down:

8. When you are finished, tap Set Photo.
9. Tap Done in the top right corner, and you’ve successfully added a photo to your contact.

And that’s it. The next time the contact calls, you can see their bright smiling face lit up on your iPhone.
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