Boot and setup Windows 10 ARM
Now, on the phone, hold Volume Down + Power at the same time until the phone vibrates.
- If after 15 seconds the phone doesn't vibrate/reboot, try that again. If it's still not working, you may have bricked the phone.
After the NOKIA logo, Windows Boot Manager will appears.
Now, quickly press Volume Up to boot Windows 10 ARM.
The phone will reboot multiple times. Each time, you have to press Volume Up at the boot menu.
If everything is normal, you will get into the Cortana setup screen.
Just setup it like normal, except don't connect to Wi-Fi during the setup or it will fall into an error loop.
Touch flipped on Lumia 1520
Reboot to mass storage mode. Open Registry Editor on your computer. click on HKEY_LOCAL_MACHINE.
Choose File > Load Hive..., then navigate to Windows10 drive\Windows\System32\config and select system. Type RTSYSTEM and enter.
In Registry Editor, navigate to HKEY_LOCAL_MACHINE\RTSYSTEM\ControlSet001\Services\NOKIA_PANEL\Parameters\Settings
Select IsUpsideDown and set it to 1. Click on HKEY_LOCAL_MACHINE\RTSYSTEM then File > Unload Hive....
If everything succeeds, it will send you to the Desktop. You can play there for a while, but there is still an additional step to do if you want to dual-boot.
Now, on the PC, open WPinternals. Go to Manual mode tab. Click interrupt the boot-process.
Connect the phone to the PC, then reboot the phone.
After the NOKIA logo, your phone will be in Flash mode.
Go to Manual mode tab, then select Switch to Mass-Storage-mode
On the PC, Go to Windows 10 ARM partition. Create a new folder named EFIESP.
Open Command prompt as Administrator. Type (line by line): Then type (line by line):
diskpart
sel vol <MainOSLetter>:\EFIESP
set id=ebd0a0a2-b9e5-4433-87c0-68b6b72699c7
assign mount=<Windows10Letter>:\EFIESP
exit
Replace <MainOSLetter> with the drive letter of MainOS. <Windows10Letter> is the letter of Windows 10 ARM partition.
Press enter.
On the phone, hold Volume Down + Power at the same time until the phone vibrates.
At the boot menu:
- Press
Volume Upto boot Windows 10 ARM. - Do nothing to boot Windows Phone.