This document created at Jul 16, 2020, 11:31:34 AM and modified at Jul 7, 2025, 3:49:48 PM.
What is Huawei Factory Mode (HUAWEI USB COM 1.0) and how to put the phone into it
Factory Mode is a special state for Huawei phones when they create a "HUAWEI USB COM 1.0" serial port to communicate with the PC. This service port can be used by Chimera to communicate with the device and execute complex service functions.
At the moment there are 3 ways to put a Huawei phone into Factory Mode:
Important: if you used Test Point, the phone will be in Factory Mode only temporarily. If you do a hard reset for example, it will automatically exit the Factory Mode. If you use Chimera's "Load Factory Fastboot", the phone will be in Factory Mode permanently, and you will need to use the "Exit Factory Mode" function to make the device exit from this mode.
A Test Point is a location on the motherboard that is used to inject test signals. Usually, Test Points are small, rounded solder pads that are easy to locate. They can be anywhere on the board, sometimes they are regular connectors or can be hidden under some shielding (metal plate).
Most test points can be found in our test point database.
If you can, you should remove the phone’s battery. Technically it’s enough to turn off the device but we strongly recommend removing the battery if possible. Please note that some models have the battery connected with two separate flexible flat cables.
Connect the model-specific test point to a grounded point on the motherboard. The heat shields (metal plates) on the motherboard are easy to access and clearly visible ground points.
Connect the phone via USB to the computer where Chimera is already running. Pro tip: keep the cable plugged into the phone and just plug the other end into the PC for this step. This way the phone will not move while you are grounding the Test Point.
The phone should appear in Chimera with the Factory Mode flag. If it doesn’t, you should check if it appears in the Windows Device Manager under serial ports as Huawei USB COM 1.0. If it did not, please perform the test point procedure again.
If the battery was disconnected and the device showed up in Chimera in Factory Mode then you should reconnect the battery at this point.
It is important to note that Load Factory Fastboot might not work on devices with new firmware versions, in that case, you must connect the device using testpoint. You can use a normal USB cable if the firmware on your device is older than EMUI 12, but if your device is running on EMUI 12 or higher you must use a special cable called the "Harmony cable".
You have several options to address different issues with your Huawei device. To start, you can remove Factory Reset Protection (FRP) to bypass the security that requires the original Google account credentials after a reset. This will allow you to access your device without needing the previous account information.
If you need to gain full access to your device without the Huawei ID after a reset, you can remove the Huawei ID itself. This step is particularly useful if you’re locked out and need to use the device without the original credentials.
For devices that are stuck in retail mode—a special mode used for display purposes in stores—you can modify the OEMINFO to get out of this restricted mode and return the device to normal operation.
If you encounter issues with activation after removing the Huawei ID, you might need to use the "Fix Chip is Damaged" procedure. This tool helps resolve problems related to damaged chips that could be preventing your device from activating properly.
Before performing any advanced tasks, it's wise to use the "Store/Restore Backup" option. This allows you to save your device settings beforehand, so you can restore them later if needed, helping to avoid potential data loss.
If you've recently changed the battery and your phone is experiencing boot looping, the "Set Battery Serial" function can help fix this problem by ensuring the new battery is properly recognized by the device.
Finally, if your device is locked to a specific network and you need to unlock it, the "Network Factory Reset" option can be used to remove network restrictions and enable you to use your device with different carriers.
These options can provide a wide range of solutions for common issues and can help you maintain full control over your Huawei device.
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