Which functions can be added to WhatsApp

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Uploading contacts is an optional feature that allows us to determine which of the contacts in your device's address book are also using WhatsApp. We can then add them to your WhatsApp contacts. We can also update your WhatsApp contacts quickly if some of your contacts who are not yet using WhatsApp register later. It is important to us that you know that WhatsApp does not share your contacts with Facebook. The WhatsApp version on your device displays the names in your WhatsApp contacts that are stored in your device's address book so that you can easily contact them.

If you use the contact upload feature and give WhatsApp access to your device's address book, WhatsApp will regularly access and upload the phone numbers in your address book. This applies to your contacts who use WhatsApp as well as your other contacts. If one or more of your contacts are not yet using WhatsApp, we will manage this information for you in a way that ensures that such contacts cannot be identified. We don't store these phone numbers and only process them for a short time to create cryptographic hash values ‚Äč‚Äčthat we can use to more efficiently establish a connection between you and these contacts when they join WhatsApp. You can control the contact upload function in your device's settings.