Answers
What's the magnetic ring on a phone case?
Short answer: it's a magnet array that lets the case snap onto MagSafe and other magnetic accessories — chargers, wallets, mounts. It's optional, separate from wireless charging, and only included if the product page says so.
What's the ring or circle on the back of some phone cases?
It's a built-in magnet array — usually a circle of small magnets around a central spot — that lets the case attach to MagSafe and other magnetic accessories. The ring lines up with magnets inside iPhone 12 and newer (and equivalent accessories), so MagSafe chargers, wallets, mounts, and grips snap on and stay in place. The ring doesn't power anything; it's purely mechanical alignment for magnetic attachments.
Do I need a magnet ring for wireless charging?
No. Standard Qi wireless charging works through any thin case, with or without a magnet ring. The ring only matters if you want the charger or accessory to magnetically snap into place rather than just sit against the phone.
How can I tell if a case has the magnet array?
The product page should say so explicitly — look for wording like 'MagSafe-compatible', 'magnetic ring built in', or 'works with magnetic accessories'. If a case doesn't mention it, assume there's no magnet array. The ring is usually visible as a faint circle on the inside or back of the case.
Do Miarobi cases have a magnet ring?
Most don't. Miarobi cases are slim, wireless-charging compatible, and work with any Qi charger — but unless a specific product page explicitly lists a magnet array, they won't magnetically snap to MagSafe accessories. Check each product page to confirm.