What is META Mode?

META in one sentence

META is a command shell that MediaTek engineers use for factory testing — exposing low-level functions like read any file, get system property, write NVRAM, and reboot into chosen mode, all over USB without needing Android to be running.

Where META fits in the boot chain

1. BROM — mask ROM in silicon, runs first
2. Preloader — first flashable code, validated by BROM
3. LK (Little Kernel) — bootloader, loads Android
4. Android — the OS

META is a mode of the Preloader. Instead of continuing to load LK, Preloader can switch into META mode when the SLA (Secure Loader Authentication) handshake arrives from the PC. In META, the Preloader keeps running and acts as a command interpreter.

What META can do

• FT_FILE_OPERATION — read or write any file on the device, bypassing Android shell permissions. Used by ART to patch LK during Infinix bootloader unlock.
• FT_GETPROP — read system properties (brand, model, Android version).
• FT_REBOOT — graceful reboot into Normal / Recovery / Fastboot.
• FT_TRANSSION_CMD_SHELL — Transsion-specific vendor shell for Infinix & Tecno.
• IMEI write — commit new IMEI1/IMEI2 to NVRAM.
• Battery info — read voltage, temperature, SOC.
• RF calibration — read/write RF test values.

Entering META

META is not reached by a key combo on its own — it requires:

1. Enter Preloader first — Volume Down + USB on most MTK devices.
2. PC sends SLA handshake — Flashing tool (ART, SP Multi-Port, mtkclient) sends the SLA packet.
3. Preloader switches to META — Device re-enumerates with VID 0E8D PID 200A as "MediaTek USB VCOM (Android)".
4. Shell is open — Tool can now issue FT_* commands.

META on Infinix/Tecno

Transsion (Infinix, Tecno, Itel) adds its own command set to META:

• FT_TRANSSION_CMD_SHELL — vendor shell, like busybox over META
• Direct block-device access through FT_FILE_OPERATION on /dev/block/by-name/lk — this is how ART patches the LK partition for bootloader unlock
• Access to /proc and /sys for property reads

These extensions are what make META the primary tool for Infinix/Tecno bootloader unlock. There's no fastboot-based unlock on these devices — the LK itself refuses external unlock commands, so you have to patch LK through META before you can use fastboot.

Is META safe?

• Entering META is non-destructive. It only switches Preloader into shell mode.
• Reading via META is non-destructive. Property reads, battery info, GPT dump — all read-only.
• Writing via META is dangerous. FT_FILE_OPERATION can overwrite any partition including preloader, nvram, and oeminfo. A wrong write can brick the device.

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