This is where most budget tablets fail.

Cause: 4K decoding is intensive; budget tablets lack heat sinks. Fix: Reduce brightness to 50%, remove the case, and prop the tablet up for airflow. If overheating persists, drop to 1080p content.

Before we answer whether 4K movies work, we must clarify a massive misconception: Just because a tablet plays a 4K file does not mean its screen displays 4K.

# Push 4K sample to device
adb push sample_4k_hevc.mkv /sdcard/Movies/