Upgrading an Android device from version 4.4.2 (KitKat) to 9.0 (Pie) is a significant jump. Because 4.4.2 was released in 2013 and 9.0 in 2018, most devices originally running KitKat do not support an official update to Pie
If the official update isn't available, you must use unofficial methods. This is for advanced users and involves risk: Unlock Bootloader : This allows you to install a custom recovery (like TWRP). Find a ROM : Visit community forums like XDA Developers and search for your exact device model and "LineageOS 16" (which is based on Android 9.0). Flash the OS upgrade android 4.4.2 to 9.0
(Google Apps) separately, as custom ROMs don't usually include the Play Store by default. The New Life Upgrading an Android device from version 4
Your device is currently frozen in 2013. In the world of Android 4.4.2, the interface is heavy with gradients and "Holo" blue accents. Apps are starting to break because Google officially ended support for KitKat's security and performance updates in 2023. When you head to Settings > About Device > Software Update, the screen likely tells you your system is "up to date," even though it feels ancient. The Wall: Why Official Updates Stop Many modern apps (Banking, Spotify, Uber) now require
Instead of forcing a 10-year-old phone to run Android 9.0, consider: