Samsung's public beta testing of One UI 5.0 based on Android 13 reached the Galaxy S21 family of devices at the end of August, when it became available in Korea and the UK. Starting now, you can also register your device for the beta program in India. Currently, you can only enroll your Galaxy S21, S21+, or S21 Ultra in the beta program in India if it was purchased unlocked. As always, in order to register, you need to have the Samsung Members app installed. Then just enter it and locate the pretty obvious banner you'll see inside, which is advertising the One UI Beta Program for One UI...
Source: https://www.gsmarena.com/one_ui_50_beta_based_on_android_13_reaches_galaxy_s21_units_in_india-news-55793.php
