The Xiaomi Redmi K90 Ultra is a 2026 Android 16, HyperOS 3 smartphone powered by the Qualcomm SM8750-AB Snapdragon 8 Elite (3 nm). It features a AMOLED, 68B colors, PWM, 165Hz, Dolby Vision, HDR Vivid, HDR10+, 9500 nits (peak)* display and is available in Black, Blue, Silver.

The Redmi K90 Ultra is equipped with a Si/C Li-Ion 8550 mAh, a 8K@30fps, 4K@30/60fps, 1080p@30/60/120/240/960fps, 720p@1920fps, gyro-EIS, HDR10+ main camera, a 1080p@30/60fps front camera. The device uses a Nano-SIM + Nano-SIM configuration.

Clearing the cache partition on your Xiaomi Redmi K90 Ultra removes temporary system files that accumulate over time and can cause slowdowns, crashes or boot issues. Unlike a factory reset this process does not delete any personal data, photos, apps or settings, making it a safe first step when troubleshooting performance problems.

Clears temporary system files without deleting personal data.