Owners of the legendary Microsoft Lumia 640 often face a dilemma: the device remains reliable, but the operating system Windows Phone has completely lost support. App stores are empty, messengers do not work, and there is a logical desire to breathe a second life into the device. The most obvious way for many is to try a custom flashing to a more current platform, in particular, Android.
However, the reality is harsh and full of technical limitations. The processor architecture Qualcomm Snapdragon 400 in this model theoretically supports Android, but the manufacturer (Microsoft) blocked the bootloaders and implemented strict digital signature checks. In this article we will analyze in detail whether there is a working method for installing a “green robot”, what alternatives exist like WoA Project and whether it is worth spending time on these experiments at all.
Many users are looking for ready-made firmware images on the Internet, hoping for a miracle. It is important to immediately dot the i’s: at the moment there is a stable, fully working version of Android for the Lumia 640, which can be installed as the main OS with full functionality (calls, camera, sensor). does not exist. Attempts to find such files most often lead to downloading malware or non-working assemblies.
Technical barriers to installing third-party OS
The main obstacle is not the lack of drivers, but Microsoft's security policy, which was in force during the Windows Phone era. The device has Secure Boot (secure boot) that verifies the digital signature of each component that boots. Since Microsoft has never signed Android bootloaders for its phones, the system simply refuses to run the kernel of someone else's operating system.
In addition, drivers for Lumia-specific hardware, such as camera or touch screen modules, were written exclusively for the Windows NT kernel. Porting them to the Linux kernel, which is used in Android, requires enormous work from programmers. For popular flagships, enthusiasts found ways to circumvent these limitations, but for a budget segment like the Lumia 640, the community interest was not high enough to create a full-fledged port.
⚠️ Attention: Any manipulations with memory sections and an attempt to write non-standard images through engineering ports (USB Loader) will most likely lead to turning the phone into a “brick.” You can restore the device after such an error only through paid service boxes such as Octopus or Chimera.
It is also worth considering the amount of built-in memory. The basic version of the Lumia 640 has only 8 GB, of which about 4-5 GB is available to the system. Modern versions of Android, even in lightweight builds (Go Edition), require more space for normal operation, which makes installation technically pointless even if there is a miraculum launch method.
WoA project: Windows on ARM as the only alternative
If installing classic Android is not possible, is there another way? Enthusiasts of the project WoA Project (Windows on ARM) have achieved impressive results by running full-fledged Windows 10 and even Windows 11 on old Lumia. This is not emulation, but a native operation of the operating system on the ARM architecture of the Snapdragon processor.
This method allows you to turn your phone into a pocket PC. You get access to desktop applications, a full browser and file system. However, this solution has its own nuances. The Windows 10 interface is not optimized for a 5-inch screen, so control requires connecting a mouse and keyboard or using special interface tweakers.
The WoA installation process is complex and requires a second Windows computer, a special set of utilities and command line skills. You will need to unlock the bootloader through specific exploits (for example, Mass Storage Mode), which does not always work the first time due to differences in hardware revisions.
Where can I download WoA images?
Official images and instructions are posted on GitHub in the Lumia-WoA repository. Downloading assemblies from third-party forums is dangerous, as they may contain modified bootloaders that steal data.
Performance in WoA Project is limited by the capabilities of the Snapdragon 400 chip. Heavy modern apps will not work, but light utilities, text editors and older versions of browsers function quite well. This is an excellent option for using the phone as a terminal or portable typewriter, but not as the main means of communication.
Before starting experiments with WoA, be sure to make a full backup of the EMMC partition via Mass Storage mode. It is extremely difficult to return your native Windows Phone after an unsuccessful firmware update without a backup.
Preparing tools and environment
If you are determined to experiment with the device, you will need a specific set of software. Standard flashing methods via Zune or Windows Device Recovery Tool are not suitable here, since they only work with signed Microsoft images. You will need tools for low-level memory access.
The main tool for interacting with the phone in bootloader mode is the utility WPInternals. This app allows you to switch your phone to different operating modes, such as Mass Storage (drive mode) or USB Loader. Without putting the device into these modes, writing any data to the system partitions is impossible.
It is also critical to have the correct set of Qualcomm drivers. Your phone should be detected correctly in Device Manager. If you see a device with a yellow exclamation point or "QHSUSB_BULK", then the drivers are installed incorrectly and any attempts to flash the firmware will fail with an error.
| Tool | Purpose | Support status |
|---|---|---|
| WPInternals | Unlock bootloader, mode switching | Relevant |
| Qualcomm Drivers | Communication between PC and phone in download mode | Stable |
| WDRT | Returning stock firmware (rescue) | Relevant |
| Fastboot | Recording images (does not work on Lumia without exploits) | Limited |
In addition to the software, you will need a high-quality USB cable. Cheap cables that only support charging will make the process impossible. Use an original Microsoft cable or a certified analogue with good shielding to avoid connection interruptions at the critical moment of data recording.
☑️ Preparing for modification
Unlocking process and risks
The most important step is unlocking the bootloader. There is an "Unlock bootloader" feature that attempts to exploit vulnerabilities in the bootloader code. The success of this operation is not 100% guaranteed and depends on the specific firmware version installed on your Lumia 640 at the moment. WPInternals There is an "Unlock bootloader" feature that attempts to exploit vulnerabilities in the bootloader code. The success of this operation is not 100% guaranteed and depends on the specific firmware version installed on your Lumia 640 at the moment.
If the unlocking is successful, the phone will be able to load an unsigned code. It is at this stage that theoretically the possibility of loading the Linux (Android) kernel opens up. However, as mentioned earlier, the lack of drivers makes this step a dead end for full use. You might see the Android logo or even the kernel loading, but it probably won't go beyond a black screen.
⚠️ Attention: Unlocking the bootloader will void your warranty (if you still have one) and may permanently change your device's security flags. Some Microsoft banking applications and services may stop working even after returning to stock firmware, since the unlock flag may remain in the Fuse bits of the processor.
During the unlocking process, the phone may reboot several times. Do not unplug the power cord at this time. If the process is stuck on the Nokia or Microsoft logo for more than 15 minutes, you may need to force a reboot using the key combination Volume Down + Power.
Unlocking the bootloader is the point of no return. Even if you do not install Android, it may be impossible to return the phone to its factory state with a full guarantee that all functions will work.
Why Android does not work: detailed analysis
Many users are wondering: why was Android ported to the Lumia 950 XL, which is also on Snapdragon, but not to the 640? The answer lies in the developer community. For flagship models, enthusiasts write drivers manually, referring to the chipset documentation. For the budget Snapdragon 400, documentation is less accessible and motivation is lower.
In addition, the Lumia 640 uses a specific implementation of the touch controller and display, the drivers for which are closed. In the Android world, Open Source drivers are standard, but in the Windows Phone ecosystem, everything was proprietary. Without display driver source code, you end up with a system that runs blind.
There are projects to run Android in emulation mode or through containers, but they require resources that the Lumia 640 simply does not have. 1 GB of RAM is the absolute minimum to run the kernel itself, not to mention the graphical shell. The system will work unbearably slowly, making the device unusable.
The Internet is replete with YouTube videos with the titles “Android on Lumia,” but these are often fakes. The authors of such videos use an Android-style theme on Windows Phone or edit a video showing an emulator running inside the system. Be critical of the sources of information.
Alternative ways to revive the device
Instead of a useless attempt to install an unsupported OS, it is better to consider options for optimizing the current system or using the phone for other purposes. Windows Phone can still serve as an excellent dialer, music player or offline navigator.
You can use the Lumia 640 as an IP camera, a webcam for a PC (via special applications, if they are still available in the archives) or as a universal remote control if the phone has an infrared port (although the 640 does not have one, you can use Wi-Fi smart home control). The device is also great for reading books or listening to podcasts.
If the goal is Android, it is more economically feasible to purchase a used entry-level Android smartphone than to spend dozens of hours on futile experiments with the Lumia 640. The cost of such devices on the secondary market is minimal, and the functionality will be many times higher.
Is it possible to return everything back?
Yes, using the Windows Device Recovery Tool you can restore the official firmware. However, if the EFI partition or bootloader has been modified, the phone may require service intervention for a complete restoration.
Frequently asked questions (FAQ)
Is there a ready-made Android firmware for the Lumia 640 that you can simply install?
No, there is no stable and working firmware. All files available on the network are either fakes or non-working test builds without support for the basic functions of the phone.
Is it safe to use the WPInternals app?
Using the app carries risks. If you do it incorrectly, you can block the device. It is recommended to use it only by experienced users who understand the partition structure of Windows Phone memory.
Can WhatsApp or Telegram be installed on the Lumia 640?
Official applications are no longer supported. There are modified versions (xAPK) that can be installed manually, but their operation is unstable and security is questionable. It is better to use the web versions through a browser, if it opens.
What to do if the phone does not turn on after experiments?
Try to perform a hard reset (Volume Down + Power). If that doesn't help, connect your phone to your PC and use Windows Device Recovery Tool to flash the stock image. In difficult cases, a service box will be required.
Why then do you need the WoA project if you can’t install Android?
WoA allows you to run a full-fledged Windows 10/11. This makes it possible to use desktop software, which for some scenarios (remote work, terminal) is much more useful than stripped-down mobile Android on old hardware.