If you just want to relive the interface or test an app without risking a phone brick, use an emulator.
: Google Play Services dropped support for KitKat in August 2023. Most modern apps (including YouTube, Chrome, and WhatsApp) will likely not function or even install. android kitkat os download
If you are a developer wanting to test app compatibility, a GSI is the cleanest way to run legacy software on modern hardware (assuming your device supports treble and you can unlock the bootloader). If you just want to relive the interface
Android 4.4 KitKat OS downloads are still out there for legacy devices. android kitkat os download
Craving some retro Android? 🍫📱