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Although there are times when WhatsApp’s voice and video calls take up a bit more data than they require and drain the battery.
Fortunately, we do have a hack to reduce data consumption on WhatsApp voice and video calls.
Before we proceed, make sure you have the latest version of WhatsApp (version 2.21.12.21 for Android, version 2.21.130.15 on iOS).
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This lets WhatsApp use the minimum required data on your smartphone for voice and video calls. Both iOS and Android users will find the option in the same ‘Storage and Data’ option within the settings.