X21 This forum has 1 topic, and was last updated 2 years, 9 months ago by Guest. Viewing topic 1 (of 1 total) Topic Voices Posts Last Post How to Install Android P on Vivo X21 and X21 UD Started by: Guest 1 1 2 years, 9 months ago Guest Viewing topic 1 (of 1 total) You must be logged in to create new topics. Log In Username: Password: Keep me signed in Log In