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Open WhatsApp. Tap the new chat icon. Tap the new contact icon. Select a storage location. Type a name for the contact. Enter the contact’s international phone number. Tap Done. Tap the back button until you’ve returned to the new chat. Tap ⁝. Tap Refresh.

Article:
It’s the green icon with a white phone and chat bubble. You’ll find it either on your home screen or in the app drawer. It’s the green circle with a white chat message at the bottom-right corner of the screen. It’s the plus (+) next to the silhouette of a person’s head and shoulders. You’ll find it at the top of the screen. This is where WhatsApp will save your new contact. You can choose to save it to your device’s internal storage or your SIM card.  Start by typing the “+” symbol, followed by the country code (e.g. 44 for UK). For example, a UK phone number would look something like this: +447981555555. It’s at the top-left corner of the screen.  It’s at the top-right corner of the screen. Your contact is now added, and your contact list is up to date.