[10] In August 2023, during the promotional phase of the Redmi K60 Extreme Edition after its release, Xiaomi stated that this phone would be among the first to upgrade to MIUI 15, promising five years of OTA updates.

[12] Xiaomi has not explained the cancellation of MIUI 15, and the promotional material regarding the five-year system OTA updates for the Redmi K60 Extreme Edition has not been retracted.

Similar to the Harmony OS, Xiaomi HyperOS faced widespread netizen controversy over whether it was entirely self-developed and accusations of being an "Android shell" upon its unveiling.

Addressing this controversy, Jin Fan, Vice President of Xiaomi Group's Mobile Department and head of the System Software Department, stated in an interview with Flypig that Xiaomi has the capability to use its own kernel or the Linux kernel to launch an operating system functionally and UI-wise identical to the released HyperOS.

[13] To prevent users from cheating in video games, engaging in illegal activities or other violations after obtaining root access to their phones and to avoid some users attributing to Xiaomi bugs due to modifying the system, Xiaomi has gradually restricted the ability to unlock the bootloader on phones sold in mainland China since the release of HyperOS.

However, netizens discovered numerous typos and formatting errors due to document conversion in the publicly released white paper,[18] sparking heated discussions online.