Edit contacts on iPhone
In the Contacts app , assign a photo to a contact, change a label, add social profiles, and more.
Tap a contact, then tap Edit.
Do any of the following:
Assign a photo to a contact: Tap “add photo.” You can take a photo or add one from the Photos app.
Change a label: Tap the label and choose one from the list, or tap Add Field to create one of your own.
Add your friends’ social profiles: Tap “add social profile.”
Allow calls or texts from a contact to override Do Not Disturb: Tap Ringtone or Text Tone, then turn on Emergency Bypass.
When you’re finished, tap Done.
On models with Dual SIM, when you call or text a contact, iPhone uses the same line you used for your previous communication with this contact by default. To choose a preferred line for phone calls and SMS/MMS message conversations, select the contact, tap default (below the contact’s name), then choose a line.
To change how your contacts are sorted and displayed, go to Settings > Contacts.