Chinese phone maker vivo has launched a new closed beta for the next version of Android for four vivo devices. The beta will allow a limited number of participants to download a non-final build of FunTouch OS 4.5 layered over Android 9.0 Pie.
The source is in Chinese, so the closed beta is very likely in reference to the Chinese versions of four vivo devices: the X21, X21 UD, NEX A, and NEX S. There are two waves of recruitment: the first one started on December 24 and ends on January 2 while the second wave starts on January 2 through January 6.
vivo NEX S
vivo promised updates…
via GSMArena https://www.gsmarena.com/vivo_launches_closed_android_pie_beta_for_x21_x21_ud_nex_s_and_nex_a_in_china-news-34859.php