The TNG Charm must be scanned directly at the back of your mobile device for the Near Field Communication (NFC) to work.
For iPhones, scan the charm at the top part of the phone’s back beside the camera, whereas for Android and other brands, scan at the middle of the phone’s back. This process may require some trial and error depending on your device.
For best user experience, please check with your device manufacturer on the NFC reader’s placement on your device prior to using the TNG Charm with your device. Please ensure that you’re scanning the charm on the back of your device for longer than 5 seconds.