Settings → Display → Motion smoothness → Choose standard (60Hz) or adaptive (120Hz). No 30Hz option without root.
Some panels may not support 30Hz properly, resulting in screen tearing or a black screen. Don’t panic. The app has a safety timeout : if you don’t confirm the new rate within 15 seconds, it automatically reverts to the previous setting. refresh rate changer 30 by rc modz apk top
Refresh Rate Changer 3.0 (often stylized as "v3.0") by is a third-party Android utility app designed to bypass system limitations and force a specific screen refresh rate on mobile devices Settings → Display → Motion smoothness → Choose