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.

A bootloop on the Xiaomi Redmi K90 Ultra occurs when the device repeatedly restarts without fully loading Android. This is commonly caused by a failed software update, corrupted system files, or an incompatible app. Most bootloops can be resolved without losing data by clearing the cache partition first before attempting a factory reset.

Factory reset may be needed as a last resort — erases all data.