*How to detect a HIDDEN CAMERA in changing rooms in garment shops &
boutiques........ In front of the changing room, take your mobile phone and
make sure that your mobile can make calls. **
** **
**Then enter into the changing room, and make a call. **
**If u can't make a call, there is a hidden camera. **
**This is due to the interference of fiber optic during the signal transfer
**
THis is interesting, thanks for the info
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