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Nokia Lumia 620 (nokia-sand)

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Nokia Lumia 620
The Nokia Lumia 620 powered off.
The Nokia Lumia 620 powered off.
Manufacturer Nokia
Name Lumia 620
Codename nokia-sand
Released 2013
Type handset
Hardware
Chipset Qualcomm Snapdragon S4 Plus (MSM8227)
CPU Dual Core 1.0 GHz Krait
GPU Adreno 305
Display 480x800 TFT LCD
Storage 8 GB
Memory 512 MB
Architecture armv7
Software
Original software Windows Phone
Original version 8
postmarketOS
Category testing
Pre-built images no
postmarketOS kernel 3.4.0
Features
Flashing
Works
USB Networking
Broken
Internal storage
No data
SD card
No data
Battery
No data
Screen
Works
Touchscreen
No data
Multimedia
3D Acceleration
No data
Audio
No data
Camera
No data
Camera Flash
No data
Connectivity
WiFi
No data
Bluetooth
No data
GPS
No data
NFC
No data
Modem
Calls
No data
SMS
No data
Mobile data
No data
Miscellaneous
FDE
No data
HDMI/DP
No data
Sensors
Accelerometer
No data
Magnetometer
No data
Ambient Light
No data
Proximity
No data
Hall Effect
No data
Haptics
No data
Barometer
No data


Contributors

Maintainer

Users owning this device


Button Shortcuts

  • Hold Power + Volume down to force the phone to reboot
  • Hold Volume down and connect it to the PC to boot it into fastboot mode
  • Hold Volume Up and connect it to the PC to boot into the recovery system

Installation

Tools

Backup Data

Postmarketos is not ready to use as a daily driver yet. So use a phone you do not need for the development. If you have some data on it, back it up now.

Clean Firmware Install

Use the Windows Device Recovery Tool to install clean Firmware. This is to avoid errors and to gain the FFU-image.

Warning WARNING: Check you Storage! Open WPInternals with your phone connected to your Windows PC. Reboot it into flash mode, to get more information. There it says, from which manufacturer your storage is. If it is from Samsung, it can cause a brick of your phone. If not, you are good to go.

Unlock the bootloader

Now use WPInternals to unlock your bootloader. You will need an FFU-image for that. Use the Download page of WPInternals to download it.

Afterward, you need the Emergency Loaders. You can also download the needed files with the Download page.

Then you need the Engineering SBL3 files, which can be found here Now unlock the bootloader.

Connect your phone in mass storage mode

Use WindowsPhoneInternals to switch to the mass storage mode. It could be that you have to give the device a drive letter.

Backup your phone

Use the WindiskImager to Backup your phone (the MainOS Partition). Therefore select the Device, select a folder for your Backup and give it a name. Afterward, switch to Normal Mode again by holding down the volume down and power key together for 10 seconds.

Flash the LittleKernel Bootloader

To boot to Android you need to flash the LittleKernel of Android4Lumia. Therefore use the iflash tool.

From here you can boot into the bootloader and follow the [[I

Troubleshooting

If your device stays black but is connected as QSUSB_DLOAD, use the WindowsDeviceRecoveryTool to make a clean firmware install.

Kernel configuration

  • CONFIG_USB_G does not show up, but it is described as required for USB-Networking
  • CONFIG_PFT, CONFIG_USE_VFB and CONFIG_KINETO_GAN do not show up in menukonfig. This options should be disabled due to the Kernel configuration guide.

See also