I Face Lag and Battery Drain on Samsung Galaxy A35 5G After One UI 8 Update

After installing the One UI 8 update today (October 3, 2025) on my Samsung Galaxy A35 5G, my phone began experiencing serious performance issues. Before the update, the device worked perfectly, but now it constantly lags and freezes, and the battery drains extremely fast even when not in use.

I tried restarting the phone, turning on battery saver mode, and closing background apps, but none of these methods helped. The problems persist, and the overall performance has noticeably worsened since the update.

My device is brand new and still under warranty. I request that the Samsung support team contact me as soon as possible and provide assistance to fix these post-update issues. I also ask for an urgent patch update or rollback option to restore the phone’s performance to normal.