As of now, there is no officially confirmed rollout date for One UI 8.5 on the Galaxy A55 5G.
However, since the A55 is a relatively new device, it is expected to receive the update.
Based on Samsung’s usual rollout pattern, it may arrive after flagship devices and initial beta testing phases are completed.
The update timeline can vary by region, so it’s recommended to keep checking in Settings → Software update or follow announcements in the Samsung Members app.
Until then, there is no exact confirmed date from Samsung.
