In a notice posted on Apple’s support page on Saturday, the company expanded previously issued security information, warning users that iPhones contain magnets and radios that emit electromagnetic fields, which “can interfere” with medical devices, such as a brand – implanted steps and defibrillators.
Saturday’s warning specifically alerts users to “the magnets inside” of all four iPhone 12 models, as well as MagSafe accessories. Apple (AAPL) notes that the iPhone 12 versions contain more magnets than previous iPhone models, but also said that they do not pose a greater risk of magnetic interference with medical devices than previous models.
Apple said in the update that medical devices may contain sensors that can react to oncoming magnets or radio waves. The company recommends keeping iPhones and MagSafe chargers a “safe distance” from medical devices – which it defines as more than 6 inches apart, or 15 inches away when charged wirelessly.
When Apple unveiled the iPhone 12 last fall, the company also announced the return of MagSafe – previously a beloved feature of the MacBook – to the iPhone. Customers can purchase MagSafe charging bases to optimize their wireless devices and other magnetic accessories, including cases and wallets that attach to the back of phones.
Apple did not immediately respond to a request for comment on why it is now expanding security guidelines. But the Heart Rhythm Journal released a report earlier this month alleging that the magnets on the iPhone 12 that make it compatible with MagSafe accessories can interfere with an implanted defibrillator.
“Consult your doctor and the medical device manufacturer for specific information about your medical device and whether you need to maintain a safe separation distance between your medical device and the iPhone or any MagSafe accessory,” Apple said in the notice. “Manufacturers often provide recommendations on the safe use of their devices in wireless or magnetic products to avoid possible interference.”
If a customer feels that their iPhone 12 or MagSafe charger is interfering with their medical device, they should stop using them, Apple said.
Another thing that iPhone 12 users should be aware of when using MagSafe chargers: avoid placing credit cards, security badges, passports or FOB keys between the phone and the MagSafe charger, as magnets can damage the magnetic tapes or RFID chips on these items, warns Apple. If you have a phone case that contains these items, be sure to remove them before charging your wireless device.
