If the Octopus reader has trouble detecting your mobile device, try placing it over the same reader again at another angle or a slight distance.If the earlier transaction is incomplete, place your mobile device over the same Octopus reader again and wait for the 'dood' sound and remaining value display that indicate a complete transaction.If you could not begin a transaction before, do so now as you normally would: place your mobile device over the Octopus reader, hold and wait until you hear the 'dood' sound and see the remaining value shown on screen.Once you have determined and addressed the cause, please follow the relevant steps below: Your mobile device may be too close to metallic materials, such as a metal mobile phone case, or to another Octopus or contactless smart card.(Please refer to the operating manual of your mobile device for more information on this.) There may be a file transfer via NFC in progress.Please refer to the operating manual of your mobile device for instructions on how to enable NFC/select the appropriate option.

The NFC function on the mobile device may not be enabled, or 'Embedded Secure Element' may not be selected (under 'Default NFC Method' inside 'NFC and Payment'), or 'Samsung Pay' may not be selected (under 'Tap and Pay' inside 'NFC and Payment').The mobile device may need a firmware upgrade.There are a number of possible causes for this problem:

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