I’m a regular user of the Galaxy S23 Ultra, and since updating to One UI 7 (Android 15), I’ve been facing significant overheating and performance throttling issues.
🔥 After the update, the phone gets unusually hot even with moderate usage, and during stress testing (e.g., 3DMark), it reaches temperatures of up to 47°C, which was not the case before.
📉 Performance has also degraded — in 20-minute tests on 3DMark, I’m now seeing only 60% stability, whereas before the update, I consistently got 80–85%.
❄️ Another major concern is that the phone doesn't cool down quickly anymore — even after stopping all tasks, the heat lingers for a long time.
✅ Battery optimization has improved with the update, but it's clear that thermal management and overall system stability have taken a hit.
