In recent years, Xiaomi introduced Anti-Rollback Protection (ARP) for many of its devices. This mechanism prevents users from flashing an older version of the MIUI firmware on a device running a newer version. If you updated your phone to a newer MIUI version and subsequently tried to flash an older Fastboot ROM, the device detects a downgrade attempt on critical partitions (like boot , system , or userdata ) and blocks the process to prevent security vulnerabilities.

The Xiaomi Redmi Note 4 remains one of the most iconic budget smartphones in the Android ecosystem. Even years after its release, a vibrant community of enthusiasts continues to use the device, often pushing its boundaries through custom ROMs, kernels, and recovery installations. However, this enthusiasm often hits a critical roadblock. One of the most dreaded error messages a Redmi Note 4 user can encounter while using the Mi Flash Tool is: "Download for partition boot is not allowed."

The error (or "remote: flashing is not allowed for critical partitions") on a Redmi Note 4 Go to product viewer dialog for this item.

If after trying everything your Redmi Note 4 is completely dead (no vibration, no LED, no fastboot), you have a hard brick.

The primary reason for this failure is a . Xiaomi devices ship with a locked bootloader to prevent unauthorized modifications to the system software.