Can you really install a 2013 OS on a 2021 device?
Technically, yes — but there’s a catch. You cannot install KitKat 4.4 on modern smartphones (like a Samsung Galaxy S21 or Xiaomi Mi 11) because of driver incompatibilities, 64-bit processors, and hardware requirements.
However, you can install KitKat on older Android devices (released ~2010–2015) using custom ROMs. This guide explains the realistic method. install android kitkat v44 on any android device 2021
Chrome for KitKat stopped syncing in 2019. Your solution: Can you really install a 2013 OS on a 2021 device
2.1. The State of Android In 2021, the Android ecosystem was dominated by Android 10, 11, and the newly released Android 12. Google and third-party app developers had largely dropped support for KitKat. 2.2. Hardware Compatibility
2.2. Hardware Compatibility