A user reports that their smartphone's mobile payment feature (e.g., tapping the phone at a checkout terminal to pay) has stopped working entirely, even though the phone shows the payment app open and ready, and the user's card is properly set up in the app. Bluetooth and Wi-Fi both function normally, and the phone connects to cellular data without issue. A technician suspects the NFC (Near-Field Communication) antenna or controller has failed. Which of the following BEST explains why NFC could fail independently while Bluetooth and Wi-Fi continue to function normally?
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