Android builds are specific to the hardware drivers of the device. A build for a Samsung Galaxy S4 will not work on a Nexus 5.
Here’s a clear, helpful review you can use for a site offering an (e.g., for a custom ROM, firmware, or emulator): android 4.4 kitkat software download
If you are an advanced user running a modern phone but want to simulate the KitKat experience, you are mostly out of luck—KitKat predates the modern Project Treble architecture that allows for GSI flashing. Android builds are specific to the hardware drivers
If you proceed with the download, treat it like restoring a classic car. It’s beautiful to look at and fun to drive around the block, but you wouldn't take it on the highway. For the retro-tech enthusiast, finding that factory image and flashing it successfully is a rite of passage—a way to pay respects to the OS that built the modern world. If you proceed with the download, treat it
