Firmware Change Update On Htc One X9

Taipei, Taiwan – HTC has begun rolling out a new incremental firmware update for the HTC One X9 (codename: e56ml_dtul) . While the device is no longer receiving major Android OS upgrades, this firmware maintenance release focuses on core system integrity, radio performance, and security hardening.

Note: Unlocking the bootloader will wipe your device completely. Firmware Change Update on HTC One X9

Note: Because this is a firmware-level change (affecting modem, secure enclave, and power management ICs), the installation will take slightly longer than a typical OTA — approximately 4–6 minutes. A single automatic reboot will occur. Taipei, Taiwan – HTC has begun rolling out

This update revises the TrustZone (TZ) firmware to address a potential vulnerability in secure boot verification. Users will notice no change in daily operation, but the update patches a speculative execution loophole specific to the MediaTek Helio X10 (MT6795) chipset. Connect the phone to your PC via USB

| Requirement | Details | |-------------|---------| | Battery | ≥ 70% (50% minimum but 70% safer due to write-sensitive eMMC) | | Storage | ≥ 2GB free (firmware backup + update file) | | Backup | Firmware updates do not wipe data, but a power failure during flash can brick the device. Backup photos/docs to SD card or cloud. | | Stock Recovery | Required for official firmware updates. TWRP cannot flash firmware zips properly. | | Unlocked Bootloader | If bootloader is unlocked, firmware updates will relock it? (No — HTC One X9 does not auto-relock, but you may lose modified partitions) |

With S-ON, no. HTC’s security flags prevent downgrading. With S-OFF, yes, but you risk bricking the radio.

To flash custom firmware, you need a custom recovery like TWRP.