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Data Drain

What is DNS Services, what does it do on iPhone 7, and why does it use so much data? Always at or around the top of my System Services Data Usage record.

iPhone 7, iOS 15

Posted on Feb 17, 2022 12:37 PM

Top-ranking reply

Raicya

Level 10

209,175 points

Posted on Feb 19, 2022 6:35 AM

Domain Name Servers (DNS) keep track of which website name belongs to which IP number. A DNS service translates a requested web address into the IP address of the server on which the website runs.

DNS is what takes you to Apple (for update download and others), iCloud (syncing, backup and others), Netflix, YouTube, Google and others.

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Data Drain

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