One UI 7 update will not be released for any Galaxy smartphone before the Galaxy S25 series' launch in late January. It's also unclear how long Samsung will take after unveiling the Galaxy S25 to begin the One UI 7 rollout for existing devices.
Furthermore, the Galaxy S21 FE may or may not get the update at the same time as the Galaxy S21, S21+, and S21 Ultra. Android 14 came to the FE model almost two weeks after the others, and Android 15 may follow the same trajectory.
Android 15 will be the last major Android OS upgrade for the Galaxy S21, S21+, and S21 Ultra, but the S21 FE will get Android 16 as well, as it launched running a newer version of Android and One UI.
