To enter Fastboot mode on a Samsung Galaxy A7 you typically need to access Recovery Mode first and then select the "Reboot to bootloader" option . Because Samsung devices primarily use Download Mode

1. Power Off: Turn the device off completely.
2. Plug in USB (Optional but recommended): Connect the USB cable to your PC (but not the phone yet). This can sometimes help trigger the mode.
3. Press and Hold: Simultaneously press and hold the Volume Down button + Bixby button + Power button.
4. Connect Cable: If the screen remains black but the device vibrates, connect the USB cable to the phone while holding the buttons.
5. Warning Screen: When the warning screen appears, release all buttons.
6. Confirm: Press Volume Up to enter Download Mode.

Searching for "how to open fastboot mode on samsung galaxy a7 repack" likely stems from confusion with other Android brands (Xiaomi, OnePlus, Pixel). Samsung deliberately removed Fastboot to push its own protocol.

Bottom line: If you bought a "Repack" phone expecting standard Fastboot, ask the seller if they replaced the bootloader. Otherwise, use Download Mode + Odin for all flashing needs.

No fancy UI. No menu. Just a command line waiting in the dark.

Entering Download mode — hardware button method (works when phone can power on)

1. Power off the device completely.
2. Press and hold: Volume Down + Home + Power simultaneously.
3. When a warning screen appears, release buttons.
4. Press Volume Up to confirm and enter Download mode.
5. Screen shows “Downloading… Do not turn off target” and a yellow ID:COM in Odin when connected.

On a repacked Galaxy A7, developers sometimes patch the bootloader or use a custom kernel that adds Fastboot functionality alongside Download Mode. In rare cases, the repack replaces the recovery partition with a Fastboot interface.

For newer models (no Home button): Press and hold Power + Volume Up.

She flashed the repack via Odin: BL_A7_ENG.tar. The phone rebooted, showing a dangerous warning: “Kernel is not seandroid enforcing.”