Microsoft Lumia 640 (microsoft-dempsey)
Status: started some research
![]() No image yet | |
Manufacturer | Microsoft |
---|---|
Name | Lumia 640 Dual SIM |
Codename | microsoft-dempsey |
Released | 2015 |
Hardware | |
Chipset | Qualcomm MSM8926 Snapdragon 400 (28 nm) |
CPU | Quad-core 1.2 GHz Cortex-A7 |
GPU | Adreno 305 |
Display | IPS LCD capacitive touchscreen, 16M colors 5.0 inches, 68.9 cm2 (~67.6% screen-to-body ratio) 720 x 1280 pixels, 16:9 ratio (~294 ppi density) Corning Gorilla Glass 3 ClearBlack display |
Storage | 8GB |
Memory | 1GB RAM |
Architecture | armv7 |
Software | |
Original software | Microsoft Windows Phone 8.1 |
postmarketOS | |
Category | testing |
Pre-built images | no |
Contributors
- Maxnet
Maintainer(s)
- Maxnet
Users owning this device
- Brad1111 (Notes: RM-1072)
- Chaosleo07 (Notes: running mainline)
- Dominduchami (Notes: Runs mainline)
- Ermine (Notes: RM-1075, runs mainline)
- FieryFlames
- Kierownik223 (Notes: LTE model)
- Marshift
- Maxnet (Notes: rm-1077, unlocked bootloader)
- Nobodywasishere (Notes: Actually the AT&T LTE model but close enough)
- PEPSIMANTR (Notes: Single SIM LTE variant(RM-1074))
- Rom4nik (Notes: RM-1077)
- Shipa (Notes: 2pcs, fon 1709 ATM)
- Wdxvvy (Notes: running W10M 1709)
Random thoughts
There is a way to get linux to boot on the device. Porting edk2 is needed, it is described in this guide : https://github.com/konradybcio/Lumia-EDK2-Guide. Also this edk2 would probably work with some small modifications : https://github.com/Dominduchami/Lumia830Pkg. Unfortunately there is no efistub or efiframebuffer support in the newest msm8226 kernel, so backporting it is required to get pmOS to boot on it.
If you got some information regarding this, please add it here.
It's possible to unlock the bootloader using WPinternals here, the device needs to be on Windows 10 Mobile. From there it may be possible to get an LK bootloader following this guide here (lk and boot shim). There is a Telegram group chat for Android4Lumia that may have more information that I missed on my brief skim through it here.
See also
- possible downstream kernel: The devices seem very similar
- Possible start for a bootloader
- lk and boot shim used above
- Windows Device Recovery Tool - useful for restoring a device
- Over-the-cable 8.1 to 10 WP Update (FYI This update takes a while)