Specific app notifications when phone is on silent vibrate mode Samsung Community 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 How to use the soul sucker 5000 #couplestiktok #vacuum #therose #thead TikTok How to Set a Vibrating Alarm Clock on iPhone, Without Sound Did You Know? In space, sound cannot travel because there is no air or medium for sound waves to move through. That means explosions in space would actually be completely silent.