So far i've launched my cat a few times hard and never had it come off. i guess it depends on how they put the metal plate on their phone.
as far as the magnet....it's 2019...we don't use magnetic discs anymore. it's all software flashed to a nand chip. magnets don't effect that data like they did on magnetic drives. i'd be more worried about cell reception, but i don't seem to have a problem.
I wasn't referring to magnets versus recording media (though I am old enough to remember when that was an existential no-no). I'm talking about the complications with magnetic fields for magnets inside the phone itself, and the ability to magnetize ferous parts of the phone. Just an example: In Apple's case design guidelines, there are sections on Sensor Considerations and Magnetic Interference, including the line, “Apple recommends avoiding the use of magnets and metal components in cases.”
Manufacturers have to ensure that the built-in magnetic compass is not affected by their cases. There’s also specific mention of the iPhone 6 Plus, because of potential problems magnets can cause for the autofocus rear camera with optical image stabilization.
That's more what I was getting at.
