Phone 3a सीरीज के लिए Nothing OS 4.0 का Open Beta वर्जन . . Know more: https://twentee7.com/open-beta-version-of-nothing-os-4-0-for-phone-3a-series/ . #NothingOS4.0 #nothingos4 #nothingphone3a #nothing #India #twentee7dotcom #Twentee7dotcom