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Optimized Battery Charging
Optimized Battery Charging holds your iPhone at 80% until you need it, to reduce battery wear. See how it differs from the Charge Limit and when to turn it off.
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Read the guideIn-depth guides
Deeper reference material for the topics that come up again and again: what a setting really does, and what changes when you turn it off.
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iPhone NFC tag reader
Yes, iPhones have NFC. Learn which models read NFC tags automatically, how to use the NFC Tag Reader on older iPhones, and how to run Shortcuts with a tag.
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What is an eSIM
An eSIM is a digital SIM built into your phone. Learn how it differs from a physical SIM, which phones support it, and how to set one up on iPhone and Android.
1 min read
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What Low Power Mode does
Low Power Mode on iPhone pauses background activity and reduces visual effects to save battery. Here is exactly what it changes and when to use it.
1 min read