Heres one cause of the problem !

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I bought a cell phone recently for use at work in delivery. I wore it on my belt. after about a month, I started getting a muscle vibration and tingle at the same place I wore it. I kept thinking the phone was vibrating, and was feeling it to see if I was getting a call. At night, I was having the syndrome. after some time I figured it out ! I stopped wearing the cell phone, the sensation stopped, and the syndrome went away at night. I also noticed I was more irritable when I was wearing the cell phone.