vibratory hallucinations 

Perception of vibratory experiences without an external stimulus and with a compelling sense of their reality, usually resulting from habitual exposure to an object and/or occurence that in reality would cause a vibratory experience.

Pam feels her cellphone vibrate, she checks her phone to find no missed calls, text messages, or voicemail... and realizes she's having vibratory hallucinations, she thinks her cellphone is vibrating when in actuality it's not vibrating at all.

vibratory hallucinations by F. Bukhari January 25, 2011