Xiaomi Auth Tool Xat (BEST)

XAT is not just a one-trick pony. Depending on the version and the server it connects to, it offers a suite of powerful features:

When you try to flash a Xiaomi device using the official Mi Flash Tool, the software checks your Xiaomi account against a server. If your account is not flagged as an "Authorized Account" (typically reserved for service centers and senior developers), Mi Flash Tool will throw the dreaded error:

"Only authorized accounts can flash this device."

The Xiaomi Auth Tool digitally mimics a server response that tells Mi Flash Tool, "Yes, this account is authorized." In essence, XAT is a patcher and server emulator that grants temporary, elevated permissions to your PC.

For legitimate bootloader unlocking:

No, unless:

For a daily driver or valuable phone — never.

Xiaomi actively fights these tools. Using XAT permanently trips the "Secure Boot" fuse on some models. You cannot relock the bootloader on some phones after using XAT without causing a brick. Additionally, service centers will refuse repair.

The original leaked tool. Very basic UI (often a grey Windows Form). It works on older Qualcomm Snapdragon chips (SDM845, SDM660, etc.). It is unreliable on newer devices like the Xiaomi 12, 13, or 14 series. xiaomi auth tool xat

Xiaomi Auth Tool (XAT) is a third-party, unofficial software application designed to bypass Xiaomi’s authorized account restriction. It allows users to flash firmware on Xiaomi devices using EDL mode without needing an officially authorized Mi account.

In simpler terms: XAT "spoofs" or "cracks" the authentication handshake between your phone and Xiaomi’s servers. It tricks the device into thinking that the flashing request is coming from an authorized service center.

Before understanding the solution (XAT), you must understand the problem. Until 2018, flashing a Xiaomi phone was simple. You would unlock the bootloader via the official "Mi Unlock" tool, wait 72 hours (or 360 hours for new accounts), and then flash any ROM using Mi Flash Tool.

Today, that process is broken for many users. Why? XAT is not just a one-trick pony

The result? If you try to flash a ROM using the standard Mi Flash Tool without an Authorized Mi Account, you are greeted with the dreaded error: "This operation is not allowed in the current account (Account not authorized)."

To flash via EDL (Emergency Download Mode)—the most powerful low-level flashing mode—you now need an account that has been granted explicit permission by Xiaomi. These are typically given only to authorized service centers.

This is where the Xiaomi Auth Tool (XAT) enters the scene.