Updated Oct 27, 2026 12:54 PM EDT You might’ve seen recent reports of users complaining that they’ve slept through alarms set on their iPhones–or even encountered it yourself. But it’s not a new bug. The silent iPhone alarm issue has plagued users for at least a couple of years, and still keeps affecting people (even though Apple has previously promised to fix it). The bug causes alarms to go off, but silently—there’s no audible ring, and no vibration.