On the morning of October 29, Lei Jun, via Weibo, responded to user concerns regarding the REDMI K90 series, including its speaker, camera features, and accessories.

A key question raised was whether the large rear speaker is prone to dust accumulation. The response clarified that the K90 Pro Max incorporates dual-layer protection for the rear speaker: an outer metal dustproof mesh and an inner dustproof net. The device has also passed IP68 dust and water resistance testing, effectively preventing dust from entering the internal components. For users concerned about dust accumulating on the mesh, Xiaomi recommends utilizing the built-in speaker cleaning function (activated via voice command to Xiao AI: "Speaker Cleaning"). Alternatively, users can visit authorized service centers for professional deep cleaning with specialized tools.

Additionally, Xiaomi released an integrated guide for the K90 series' camera features:

a. Super Moon Mode All K90 models support the Super Moon feature, which automatically activates when zooming beyond 20x to capture lunar shots. Note: Recent camera interface updates have significantly streamlined menus and relocated functions. Users are advised to review the initial setup guide for optimal navigation. Location: Settings > AI Smart Recommendations > Super Moon (enabled by default).

b. Watermark Customization The K90 series introduces upgraded watermark options, including: - Standard - Check-in - Classic - Film-style - Motion-tracking Users can customize elements like border position, frame color, and personalized tags, alongside standard metadata (GPS coordinates, lens parameters, timestamp). Customization depth varies by watermark type. Location: Camera top menu > Watermark (toggle ON) > More (edit individual watermarks).