I keep my iPhone in a belt case on my left hip. Oftentimes I am feeling what seems to be the vibration of my phone ringing, but it's not and not nearly the intensity of the phone's actual vibrations. Usually the 'sensation' lasts between 1 to 3 seconds and it's directly behind the phone.
In all fairness, I experience Sciatica as well to my left side region, but that consists more of pain in my lower back and lower left butt, not tingling sensations. This 'ringing vibration' is waist height and, seriously, immediately behind where the phone is stored.
Can it be that we don't know all there is to know about what effects the internal autonomous actions these phones do while 'idle' are causing to our nervous systems when seeking WiFi connections, refreshing apps, GPS stuff, etc.?
Maybe this is the Sciatica and I'm overthinking the sensation due to the location and the randomness of it, but it's odd and concerning. Too often I'm checking my phone for messages is the questionable intensity and duration of the 'vibration'. It's short and too much like a 'notification', but not.
Call me crazy.
I have an appointment with a neurologist coming in June to address a familial tremor and the sciatica. (Maybe should be a Psychiatrist?) I'll ask him as well about 'vibration like', localized, tingling. I'll also shift the phone or pocket it to see what happens, but anyway, it's strange stuff reading of other people's concerns about these phones emitting dangerous waves, not only the general concern to human interaction, reality, and society.
This discussion is related to Radiation from iPhone creating tingly thumbs