: This firmware specifically targets "Your device is locked" or "PayJoy" style MDM restrictions often found on this model.
One concrete file that matches this description is:
While holding the buttons, connect the phone to the PC via the USB cable.
: Removes "warning mode" messages or bootloader unlocked logos that typically appear during startup after system modifications.
The CPH2557 has a dedicated test point on the motherboard that forces the phone into BROM mode when shorted to ground.
