Q1. What is EDL Mode and how do I enter it?

EDL (Emergency Download Mode) is a low-level recovery mode for Qualcomm devices that allows flashing even if the device is bricked. For the Archos 55b Cobalt Lite, the standard method is to power off the phone, then press and hold both the Volume Up and Volume Down buttons simultaneously while plugging the USB cable into the PC.

Q2. Can I use this firmware on the standard Archos 55 Cobalt?

No. The "Lite" version has different hardware specifications from the standard model. Flashing firmware intended for one model onto the other can cause instability, hardware malfunctions (like a non-working camera), or a hard brick. Always use the firmware that matches your exact model name.

Q3. QFIL shows a "Sahara Fail" or "Firehose Fail" error. What should I do?

These are common QFIL communication errors. A "Sahara Fail" error usually points to a problem with the USB connection or drivers. Try a different USB 2.0 port and reinstall the drivers. A "Firehose Fail" error often means the programmer file is incorrect or not being accepted by the chipset. Ensure you have selected the correct .mbn file from the firmware folder.

Archos 55b Cobalt Lite Stock Firmware (QFIL Flash File)

The Archos 55b Cobalt Lite is a 5.5-inch 4G LTE smartphone from the French company Archos, released around 2016. Running on Android 6.0.1 Marshmallow and powered by a Qualcomm Snapdragon processor, it was a capable entry-level device for its time. If your Archos 55b Cobalt Lite is bricked, stuck in a bootloop, or suffering from severe software corruption, flashing the official stock firmware is the definitive method to restore it to its original factory condition.

Important Note: This device is powered by a Qualcomm chipset. The flashing process requires the QFIL Tool from the QPST software suite and will completely erase all your personal data.

⚠️ Prerequisites: Before You Begin

Click Here for the Essential Pre-Flashing Checklist

Backup Your Data: If the device is accessible, back up any important data. This process will wipe the internal storage.
Charge Your Phone: A charge of at least 50% is recommended to prevent power loss during the flashing process.
Windows PC & USB Cable: You will need a Windows computer, the original or a high-quality USB data cable, and the correct drivers.

📱 Quick Device Specifications

Device: Archos 55b Cobalt Lite
Release Year: 2016
Chipset: Qualcomm Snapdragon 210 (MSM8909)
Display: 5.5″ HD IPS LCD (1280×720)
Battery: 2700 mAh
OS: Android 6.0.1 Marshmallow
RAM/Storage: 1GB / 16GB

🛠 Required Tools & Downloads

File / Tool	Download Link
QPST (Contains QFIL)	Download Tool
Qualcomm QDLoader Drivers	Download Drivers

⬇️ Archos 55b Cobalt Lite Stock ROM / Firmware

Model	Android	Chipset	Type	Download	Size
55b Cobalt Lite	6.0.1 Marshmallow	Snapdragon 210	QFIL Flash File	Google Drive	1.0 GB

⚡ Quick Flashing Guide

Download and install the Qualcomm 9008 drivers. Extract the firmware (Archos_55B_Cobalt_Lite...QPST.zip) and the QPST Tool on your PC.
Power off the phone and boot it into EDL Mode. To do this, press and hold both Volume Up + Volume Down buttons, then connect the phone to the PC via USB.
Launch QFIL. It should automatically detect the phone as “Qualcomm HS-USB QDLoader 9008” on a COM port.
Under “Select Build Type,” choose Flat Build. For “Select Programmer,” browse to the firmware folder and select the prog_emmc_firehose_...mbn file. Click “Load XML” and select the rawprogram_unsparse.xml and then patch0.xml.
Click the “Download” button to begin flashing. Disconnect and reboot the device once the process shows “Download Succeeded.”

For a more detailed, step-by-step walkthrough of the QFIL process, please see our complete guide:
👉 Full Tutorial: How to Flash Qualcomm Firmware with QFIL

❓ Frequently Asked Questions (FAQs)

Q1. What is EDL Mode and how do I enter it?: EDL (Emergency Download Mode) is a low-level recovery mode for Qualcomm devices that allows flashing even if the device is bricked. For the Archos 55b Cobalt Lite, the standard method is to power off the phone, then press and hold both the Volume Up and Volume Down buttons simultaneously while plugging the USB cable into the PC.
Q2. Can I use this firmware on the standard Archos 55 Cobalt?: No. The “Lite” version has different hardware specifications from the standard model. Flashing firmware intended for one model onto the other can cause instability, hardware malfunctions (like a non-working camera), or a hard brick. Always use the firmware that matches your exact model name.
Q3. QFIL shows a “Sahara Fail” or “Firehose Fail” error. What should I do?: These are common QFIL communication errors. A “Sahara Fail” error usually points to a problem with the USB connection or drivers. Try a different USB 2.0 port and reinstall the drivers. A “Firehose Fail” error often means the programmer file is incorrect or not being accepted by the chipset. Ensure you have selected the correct .mbn file from the firmware folder.

🔧 Device-Specific Troubleshooting

Device Not Detected in QFIL (No Port available): This is the most common problem and is 99% driver-related. Uninstall any existing Qualcomm drivers and reinstall the specified QDLoader 9008 drivers. You may need to disable Driver Signature Enforcement in Windows. Check Windows Device Manager; the device should appear as “Qualcomm HS-USB QDLoader 9008,” not “QHSUSB_BULK.”
PC Blue Screens (BSOD) Upon Connecting Device: A Blue Screen of Death when you plug in the device indicates a severe driver conflict. This often happens if multiple different types of Android USB drivers are installed. You may need to use a driver cleanup utility to remove all old drivers before reinstalling the correct ones for your device.
Stuck on “waiting for programmer response”: This indicates a communication issue between the tool and the device. Try a different USB port (preferably a USB 2.0 port on the back of a desktop PC), use a shorter, high-quality USB cable, and ensure the device has some battery charge.
Successful Flash but Device Won’t Boot: If QFIL reports “Download Succeeded” but the phone is stuck on the Archos logo, it needs a factory reset. Power it off, then boot into recovery mode (usually by holding Power + Volume Up). In the recovery menu, select “Wipe data/factory reset” and then “Reboot system now.”