Update README.md

README.md

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 # Windows 10 Mobile build 15400 for all supported devices!
-With these cabs you can install 15400 on any device that can run 15254! The cabs were extracted from the 15400 leak from a Lumia 830 device. Note the cabs are Test signed as they are unofficial
+This build is the *last ever* build that left Windows Phone build lab on Microsoft, which never got released due to discontinuation of WP. The build is extracted to cabs from the 15400 leak from a Lumia 830 device.
 
-## Updates:
-- Removed a Resolution package that was included by accident, preventing install
+With these cabs, you can install 15400 on *any* device that can run 15254! Note the cabs are Test signed as they are unofficial.
+
+## Installition Guide
+- Ensure the device runs 15254 build
+- Unlock the bootloader
+- Install [Flight signing files](https://github.com/Empyreal96/W10M-16212-Guides/raw/main/SimpleFlightEnabler.zip) with this script.
+- Reboot and set the Date to anything before September 5 2017
+- Download the cabs from releases and extract them to a folder.
+- Push provided cabs with iutool. (`iutool -V -p [path to folder of cabs you extracted]`).
+  - Get iutool from [here](https://github.com/Empyreal96/Updating-WP-FFUs-Guide/raw/main/W10M_Tools.7z) if you don't have it.
+- Wait for it to install
+- Enjoy.
 
+## Differences From 15254
+- This build has a slightly improved Edge browser with much more settings on `about:flags`
+- There is a smoother fade-in animation on apps on app switching screen (?)
 
-### Requirements:
-- Cabs provided
-- A Device running 15254
-- [Flight signing files](https://github.com/Empyreal96/W10M-16212-Guides/raw/main/SimpleFlightEnabler.zip)
-- Mass Storage Access
+## Known Issues
+- Timezones are not available (list is empty on settings)
 
+## Screenshots
+Soon™
+
+## Changelog
+- Removed a Resolution package that was included by accident, preventing install
 
-### Guide
-- Boot into Mass Storage Mode and run the SimpleFlightEnabler tool to enable Flight Signing 
-- Reboot and set the Date to anything in 2017
-- Push provided cabs with iutool.