The NFC antenna is connected to the Power Button Flex. Take a look at this [http://www.phonepartspro.com/iphone-se-details-inside-stuff/|website] (you'll have to search for NFC, it's about 3/4 of the way down the page).
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The NFC antenna is connected to the Power Button Flex. [Dead link removed]
You may have either damaged the flex, connected it improperly or there is an issue with your replacement housing. Generally speaking, the housing is part of the antenna. If all your other antenna's work, then it may just be one of the first to options above.
The NFC antenna is connected to the Power Button Flex. Take a look at this [http://www.phonepartspro.com/iphone-se-details-inside-stuff/|website] (you'll have to search for NFC, it's about 3/4 of the way down the page).
You may have either damaged the flex, connected it improperly or there is an issue with your replacement housing. Generally speaking, the housing is part of the antenna. If all your other antenna's work, then it may just be one of the first to options above.