Q1. Can I use this firmware to upgrade my phone to Android 6.0 Marshmallow?

No. This is the official Android 5.1 Lollipop firmware. No official updates to newer Android versions were ever released by Archos for the 55 Helium Plus.

Q2. I'm getting a "BROM ERROR" in SP Flash Tool. What should I do?

BROM errors typically indicate a communication failure between the PC and the device. The most common causes are incorrect VCOM drivers, a faulty USB cable, or an unstable USB port. Re-install the drivers, try a different cable/port, and ensure the phone is completely powered off before connecting it.

Q3. My phone's IMEI is showing as "Invalid" after flashing. How can I fix this?

An invalid IMEI is caused by erasing the NVRAM partition, which happens if you use the "Format All + Download" option in SP Flash Tool. This stock firmware, when flashed in "Download Only" mode, will not restore a lost IMEI. You will need a separate, more advanced tool like Maui META to write your original IMEI numbers back to the phone.

Archos 55 Helium Plus Stock Firmware (Flash File)

The Archos 55 Helium Plus is a 5.5-inch 4G LTE smartphone from the French company Archos, released in 2015. Running on Android 5.1 Lollipop, it was designed to provide a large-screen experience with fast mobile data for budget-conscious users. If your Archos 55 Helium Plus is bricked, stuck in a bootloop, or suffering from persistent software errors, flashing the official stock firmware is the most reliable way to restore it to its original, functional state.

Important Note: This device is powered by a MediaTek chipset. The flashing process requires the SP Flash Tool and will completely erase all your personal data.

⚠️ Prerequisites: Before You Begin

Click Here for the Essential Pre-Flashing Checklist

Backup Your Data: All your files, photos, and contacts on the internal storage will be permanently deleted during this process.
Charge The Battery: To prevent interruptions, ensure the phone’s battery has at least a 50% charge before you begin.
Windows PC & USB Cable: This procedure requires a Windows computer and the phone’s micro USB data cable.

📱 Quick Device Specifications

Device: Archos 55 Helium Plus
Release Year: 2015
Chipset: MediaTek MT6735
Display: 5.5″ HD IPS LCD (1280×720)
Battery: 2400 mAh (Removable)
OS: Android 5.1 Lollipop
RAM/Storage: 1GB / 8GB

🛠 Required Tools & Downloads

File / Tool	Download Link
SP Flash Tool	Download Tool
MediaTek USB VCOM Drivers	Download Drivers

⬇️ Archos 55 Helium Plus Stock ROM / Firmware

Model	Android	Chipset	Type	Download	Size
55 Helium Plus	5.1 Lollipop	MediaTek MT6735	SP Flash Tool	MediaFire	685 MB

⚡ Quick Flashing Guide

Download and install the MediaTek VCOM drivers. Extract the firmware (Archos_55_Helium_Plus...zip) and the SP Flash Tool on your PC.
Launch flash_tool.exe. Click the “Scatter-loading” button and select the MT6735_Android_scatter.txt file from the extracted firmware folder.
Ensure the flashing mode in the dropdown menu is set to “Download Only.”
Power off your phone and remove the battery. Click the green “Download” button in SP Flash Tool, then connect the phone to your PC via USB cable (without the battery).
The flash will start automatically. Once you see the green checkmark pop-up, you can disconnect the phone, re-insert the battery, and power it on.

For a more detailed, step-by-step guide on this process, please refer to our main tutorial:
👉 Full Tutorial: How to Flash MediaTek Firmware with SP Flash Tool

❓ Frequently Asked Questions (FAQs)

Q1. Can I use this firmware to upgrade my phone to Android 6.0 Marshmallow?: No. This is the official Android 5.1 Lollipop firmware. No official updates to newer Android versions were ever released by Archos for the 55 Helium Plus.
Q2. I’m getting a “BROM ERROR” in SP Flash Tool. What should I do?: BROM errors typically indicate a communication failure between the PC and the device. The most common causes are incorrect VCOM drivers, a faulty USB cable, or an unstable USB port. Re-install the drivers, try a different cable/port, and ensure the phone is completely powered off before connecting it.
Q3. My phone’s IMEI is showing as “Invalid” after flashing. How can I fix this?: An invalid IMEI is caused by erasing the NVRAM partition, which happens if you use the “Format All + Download” option in SP Flash Tool. This stock firmware, when flashed in “Download Only” mode, will not restore a lost IMEI. You will need a separate, more advanced tool like Maui META to write your original IMEI numbers back to the phone.

🔧 Device-Specific Troubleshooting

Phone Not Detected by PC: The removable battery simplifies this process. If the phone is not detected, the issue is almost always the VCOM drivers. Re-install them correctly. Then, click “Download” in SP Flash Tool *before* connecting the phone (without its battery) to the PC to ensure it’s in the correct state.
“PMT changed for the ROM” Error: This partition error can occur if the existing software on the phone has a different layout from the firmware you are flashing. To fix this, change the flashing mode in SP Flash Tool from “Download Only” to “Firmware Upgrade” and try again. This will erase all data.
4G/LTE or SIM Card Not Working: After a successful flash, if you have no mobile network, first check that your SIM card is inserted correctly and that your APN settings are correct for your carrier. If the IMEI is valid and settings are correct, a corrupted modem file could be the issue. Re-flashing the firmware in “Download Only” mode can resolve this.
Stuck on Archos Logo After Flashing: If the flash completes but the phone won’t boot, you must perform a factory reset. Power off the device, then boot into recovery mode (usually by holding Power + Volume Up). In the menu, select “wipe data/factory reset,” and then reboot.