About NFC, check this blog: http://community.umidigi.com/article-350-1.html
The Wi-Fi 802.11ac support is not clear yet. Theoretically the whole MTK Helio X series and Helio P20 and P25 support it but in fact currently only UMI(DIGI) Z and Z Pro (Helio X27) support the 5GHz 11ac standard, not even the newer Z1 and Z1 Pro. So, we'll see it later but I don't think so, 433Mbps vs 135Mbs (11n connection) really makes sense if it's about a mobile phone since that's simply not possible to use at nearly that high data speed in any application.
UMi Z connected to a WiFi router set to 11ac connection
UMi Z connected to a WiFi router set to 11ac connection
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