Why does my Galaxy S3 make a noise when I put it down?
Why my samsung S3 play a sound when I put above my gym magnetic card? Only with this card the device play this type of sound. Nothing happen if I put it above credit card or other magnetic/chip support. The gym card open doors and let me enter inside the gym if I've paid. There's a way (maybe an app) to read what happen when my s3 grab that card?