As already mentioned, the WhatsApp contact list is based on the phone memory contact list. If contacts disappear, it is possible to solve the problem by a simple manual synchronization of WhatsApp and smartphone. To do this, three options are possible.
Update contact list (Android) :
- Open WhatsApp and tap on thegreen bubble icon at the bottom right.
- Tap the three-dot icon at the top right and » Refresh « .
- The contact list in WhatsApp is now updated.
Sync WhatsApp Account (Android) :
- Open the menu » Settings from the phone.
- In the list of settings, tap » Accounts « .
- Select « WhatsApp » and tap » Account synchronization « .
- Your WhatsApp contacts are now synced with the contacts in your device’s memory.
