How to Set a Vibrating Alarm Clock on iPhone, Without Sound Old iPhones Had Their Own Vibe , That classic vibration sound instantly brings back another era of phones. , Before silent haptics became smoother, every alert had a sharper personality you could Cool phone tip I just learned You can keep your phone on silent and still hear calls or texts from specific people like family, close friends, or co commanders . Here's Custom iPhone Silent Mode Vibrations: The Right Way