Crucial Warning: Verify your device codename is myron using "fastboot getvar product" before flashing. Model 25102PCBEG denotes the official Global/UK POCO F8 Ultra, while 25102RKBEC is the China domestic Redmi K90 Pro Max. Never select "clean all and lock" (flash_all_lock.bat) in Mi Flash Tool when flashing Global or European firmware on Chinese hardware, as locking cross-region partitions triggers an immediate hard brick requiring authorized EDL authentication.
Verified Stock Firmware Packages for Redmi K90 Pro Max / POCO F8 Ultra (myron)
Official China Stable (myron) 3 packages
myron-ota_full-OS4.0.6.0.XPMCNXM-user-17.0-66564d402b.zip
Official China Beta Recovery OTA update for HyperOS 4.0 on Android 17. Flashable via recovery sideload or local system updater.
MD5: 66564d402b27936a988699767aa68775
myron_images_OS4.0.5.0.XPMCNXM_20261021.0000.00_17.0_cn_6a7d5f8f04.tgz
Official China Fastboot ROM for HyperOS 4.0 on Android 17. Unpack twice with 7-Zip and flash via Mi Flash Tool with "clean all".
MD5: 6a7d5f8f042ff589d75b419c0750b1c9
myron-ota_full-OS4.0.5.0.XPMCNXM-user-17.0-e2d9be411c.zip
Official China Recovery OTA update for HyperOS 4.0 on Android 17.
MD5: e2d9be411c528f3c867e40138f9c5b58
Official Global Stable (myron_global) 2 packages
myron_global_images_OS3.0.303.0.WPMMIXM_20260916.0000.00_16.0_global_98a8db2571.tgz
Official Global Fastboot TGZ package for POCO F8 Ultra (25102PCBEG) with pre-installed Google Mobile Services and international language support.
MD5: 98a8db257115391f623812e5fdf336a3
myron_global-ota_full-OS3.0.303.0.WPMMIXM-user-16.0-df6ab77756.zip
Official Global Recovery OTA package flashable through stock recovery or local system updater.
MD5: df6ab7775610cba60dd97a4626b060b0
Official EEA Europe Stable (myron_eea_global) 2 packages
myron_eea_global_images_OS3.0.303.0.WPMEUXM_20260920.0000.00_16.0_eea_c90fffdf99.tgz
Official European EEA Fastboot TGZ package. Fully compliant with UK and European carrier standards and GDPR privacy protections.
MD5: c90fffdf99c7bc1be23133f0e0e0639a
myron_eea_global-ota_full-OS3.0.303.0.WPMEUXM-user-16.0-e0c78c2155.zip
Official European EEA Recovery OTA package for POCO F8 Ultra.
MD5: e0c78c2155da046d93f7bbbb1f3be887
Official Indonesia Stable (myron_id_global) 2 packages
myron_id_global_images_OS3.0.303.0.WPMIDXM_20260920.0000.00_16.0_id_7c13e58a5d.tgz
Official Indonesia Fastboot TGZ package with Indonesian regional telecom provisioning and Google Mobile Services.
MD5: 7c13e58a5d6403243a027061a4163d7e
myron_id_global-ota_full-OS3.0.303.0.WPMIDXM-user-16.0-25dff508bd.zip
Official Indonesia Recovery OTA package for POCO F8 Ultra.
MD5: 25dff508bd055ea18951d412a0aff036
Official Taiwan Stable (myron_tw_global) 2 packages
myron_tw_global_images_OS3.0.303.0.WPMTWXM_20260920.0000.00_16.0_tw_4717d96529.tgz
Official Taiwan Fastboot TGZ package with Traditional Chinese localization and NCC regulatory certifications.
MD5: 4717d96529f4966f2912e9c1a863c54a
myron_tw_global-ota_full-OS3.0.303.0.WPMTWXM-user-16.0-818162c88e.zip
Official Taiwan Recovery OTA package for POCO F8 Ultra.
MD5: 818162c88e073e2d83fa8c657886cb7a
Custom Recoveries (OrangeFox / TWRP) 3 packages
OrangeFox-R12.0-Unofficial-myron.img
Unofficial OrangeFox Recovery R12.0 image built for myron on Android 16/17 Virtual A/B architecture. Flash to vendor_boot via Fastboot.
MD5: 67277842
twrp-3.7.1_16-myron-MissMyTime.img
Custom TWRP 3.7.1_16 image compiled by MissMyTime for myron. Fully supports Android 16 and 17 File-Based Encryption decryption.
MD5: 65739378
OrangeFox-R11.3-Unofficial-myron.img
Unofficial OrangeFox Recovery R11.3 build for myron supporting Magisk injection, OTA survival, and partition backups.
MD5: 65241393
Fastboot Flashing Procedure for Snapdragon 8 Elite Platform
- Verify Hardware Codename myron & Bootloader Authorization
- Download and extract Fastboot package twice with 7-Zip
- Boot phone into Fastboot mode via Volume Down + Power
- Configure Mi Flash Tool with "clean all"
- Flash stock partitions and await reboot
Pre-Flash Hardware Verification & Environment Setup
- Confirm your hardware codename is myron via fastboot getvar product before attempting any flashing operation.
- Extract Fastboot .tgz archives twice with 7-Zip until flash_all.bat sits cleanly in a top-level directory like C:myron_fw.
- Verify binary integrity against verified MD5 checksums (such as c90fffdf99c7bc1be23133f0e0e0639a for EEA build OS3.0.303.0.WPMEUXM).
- Install 64-bit Qualcomm QDLoader 9008 and Google Android Bootloader drivers on your Windows PC to prevent transfer drops during large 13 GB+ UFS 4.0 partition writes.
- Ensure at least 50% battery on the 7,560 mAh cell and connect using a certified high-throughput USB Type-C data cable plugged directly into a rear motherboard USB port.
Cross-Model Sibling Identity & Regional Channel Taxonomy
Flashing official Fastboot packages requires an unlocked bootloader authorized through the official Xiaomi Community application. Always select clean all in Mi Flash Tool to avoid locking cross-regional partitions.
Ready to Flash This Firmware?
Full step-by-step instructions for Xiaomi Redmi K90 Pro Max / POCO F8 Ultra, including prerequisites, error fixes, and screenshots, are on FlashGuideHub's Mi Flash Tool guide.
Can also be flashed via QFIL: Open QFIL Guide →
Hardware Taxonomy & Archival Build Clarifications
The Redmi K90 Pro Max (model 25102RKBEC, China market) and POCO F8 Ultra (model 25102PCBEG, Global/UK market) share the exact same internal motherboard codenamed myron. Both handsets utilize identical Qualcomm Snapdragon 8 Elite silicon, CSOT 144Hz 2K OLED display panels, 7,560 mAh silicon-carbon batteries, and periscope optical camera assemblies. Firmware packages tagged with myron are cross-compatible at the partition level, though bootloader relocking across regional boundaries remains strictly prohibited.
HyperOS build strings on myron follow standardized Xiaomi release taxonomy: OS4.0 designates HyperOS 4.0 on Android 17.0 (with letter prefix X), while OS3.0 designates HyperOS 3.0 on Android 16.0 (with letter prefix W). The two-letter device code PM denotes the myron hardware line, followed by regional branch designations (CN for China, MI for Global, EU for Europe, ID for Indonesia, TW for Taiwan).
China domestic packages (XPMCNXM) integrate domestic system applications, Chinese cellular carrier optimizations, and proprietary modem configuration blocks that omit European LTE Band 20 (800 MHz) carrier aggregation. Global and European EEA builds (WPMMIXM/WPMEUXM) integrate full Google Mobile Services, Widevine L1 streaming certifications, and comprehensive international 5G and 4G frequency band profiles.