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NFC is a way for your mobile to communicate with other devices. If NFC is activated, your mobile can be placed on a device that supports NFC to connect.
Once a connection is made, data can be shared securely between your mobile and other device.
It is important that when communicating, your mobile and the device are not more than 10 centimeters apart.
For example, NFC is used to make contactless payments with a telephone, but NFC is also becoming increasingly common on healthcare devices. For example, the Glucose sensor from Freestyle Libre.