Apple is making a change to its mobile OS to restrict a feature that apps like Facebook’s Messenger and WhatsApp use to make voice calls over the Internet.

The call feature in the apps runs in the background even when not in use, which means the apps can connect calls faster while performing other tasks such as data collection.

Apple’s iOS will now restrict the background access to apps while users make Internet calls.

The move will force the social media giant to redesign its messaging apps and may impact WhatsApp, which has been using the Internet calling feature in a variety of ways, including for implementing the app’s end-to-end encryption.

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