POCO F8 Ultra / REDMI K90 Pro Max (myron) HyperOS Firmware China OS4.0.5.0.XPMCNXM Fastboot ROM
HyperOS updates for POCO F8 Ultra (codename myron). Official Fastboot ROM and Recovery ROM firmware, build OS4.0.5.0.XPMCNXM.
Fastboot package: myron_images_OS4.0.5.0.XPMCNXM_20261021.0000.00_17.0_cn_6a7d5f8f04.tgz
Security patch: 2026-10-01
POCO F8 Ultra / REDMI K90 Pro Max Details
CPU
Snapdragon 8 Elite Gen 5
Latest Version
OS4.0.5.0.XPMCNXM
Android Version
17
OS Version
HyperOS 4
Display Size
6.9"
EOL Status
2031-11-26
Fastboot ROM and Recovery ROM
Download the OS4.0.5.0.XPMCNXM Fastboot ROM or Recovery ROM for POCO F8 Ultra (myron). Recovery ROM installs from the Updater app. Fastboot ROM flashes with Mi Flash Tool.
Read MoreRecovery ROM
- Download the Recovery ROM.
- Open the Updater app on your POCO F8 Ultra.
- Tap the three dots and select Choose update package.
- Select the downloaded ROM. The phone reboots into the new version when it finishes.
Fastboot ROM
- Download the Fastboot ROM package (myron_images_OS4.0.5.0.XPMCNXM_20261021.0000.00_17.0_cn_6a7d5f8f04.tgz).
- Boot the phone into Fastboot and connect it to a computer.
- Flash the package with Mi Flash Tool. Fastboot flashing erases data.
Note: Match the codename myron before flashing. Beta builds may not install from the stock updater.
Device Photos
Regions
Latest
China
Beta
EEA Global
Indonesia Global
Global
Taiwan Global
OS4.0.5.0.XPMCNXM
17 HyperOS 4.0 China Fastboot ROM
OS3.0.303.0.WPMEUXM
16 HyperOS 3.0 EEA Global Fastboot ROM
OS3.0.303.0.WPMIDXM
16 HyperOS 3.0 Indonesia Global Fastboot ROM
OS3.0.303.0.WPMMIXM
16 HyperOS 3.0 Global Fastboot ROM
OS3.0.303.0.WPMTWXM
16 HyperOS 3.0 Taiwan Global Fastboot ROM
