Vivo may be working on a version of its NEX A smartphone with an in-display fingerprint scanner. The assumption is derived from a model name listed in a certification with the Chinese Ministry of Industry and Information Technology. The model in the listing is the vivo NEX UD A, UD meaning under display fingerprint and it's logical to assume that it's just a NEX A with an in-display fingerprint scanner and no scanner on the back. Meanwhile in Russia, four mystery vivo devices have been certified with the Eurasian Economic Commission. The model numbers are vivo 1807, vivo 1811 and...
Source: https://www.gsmarena.com/theres_a_vivo_nex_a_with_an_under_the_display_fingerprint_scanner_in_the_works-news-32991.php
