Samsung has confirmed that the One UI 7 rollout will begin on April 7, starting with the Galaxy S24 series, Z Fold 6 and Z Flip 6. The Android 15-based update will later expand to the Galaxy S23 series, S23 FE, Z Fold 5, Z Flip 5 and Tab S10/S9 series. With the stable release approaching, One UI 7 Beta 5 may be the final test version for the Galaxy S24, though another beta update is still possible.
Source: Android Authority
