Your smartphone is making you hallucinate. It's called phantom vibration syndrome yes, it's a real psychological phenomenon and studies in the past few years have found, when surveying college undergraduates, Has anyone experienced a vibrating upper left leg? Do you experience a vibrating sensation in your legs? I have a problem: when my phone is set to vibrate only and someone calls me while it's in my pocket, the vibrations simply fade out. Because of that, sometimes I don't Why Does My Phone Randomly Vibrate: iPhone + Android Feeling a Buzz in Your Heels? Causes, Symptoms & Treatment