Traces of a new Android One device have been discovered in Xiaomi's MIUI 10 firmware. The phone could be the Mi A3—or something completely unexpected. It will apparently also have support for NFC, which would make it the first Xiaomi Android One phone to do so.
https://www.notebookcheck.net/Xiaomi-is-working-on-a-new-Android-One-phone-could-be-the-Mi-A3.391416.0.html