If you dont know what to listen for download a ping test app
SoundMoneyMetals (@soundmoneymetals) • Instagram photos and videos
Pingcoin - Apps on Google Play
The Pocket Pinger
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CoinTrust app - gold/silver coins and bars sound verification for
Is this coin fake ? I made ping test via app Pingcoin, which there is 0/3 tones recognized. The coin Is not magnetic and weights 13,18 grams. It sounds little different compared
The Pocket Pinger
CoinTrust app - gold/silver coins and bars sound verification for
The Pocket Pinger