Download the correct TWRP image ( .img or .tar file) tailored specifically to your device model from the official TWRP website.
It is generally to directly upgrade an Android device from version 4.4.2 (KitKat) to 9.0 (Pie) using an official method. Most devices that launched with 4.4.2 stopped receiving updates years ago.
This is the only way to get Android 9.0 on a KitKat device. This involves wiping the manufacturer’s software and replacing it with a community-built version of Android. upgrade android 4.4.2 to 9.0
The upgrading process requires completely wiping your device's internal storage.
Some devices released late in the 4.4.2 cycle might have received official updates. Go to > About Phone > System Updates . Download the correct TWRP image (
Swipe the slider at the bottom to erase the old operating system completely. Step 4: Flash Android 9.0 and Google Apps Go back to the main menu of TWRP and tap . Tap Select Storage and choose your external MicroSD card. Locate the Android 9.0 Custom ROM .zip file and tap it. Tap Add more Zips and select the OpenGApps .zip file.
While newer OS versions are heavier, Android 9.0 includes “Project Treble” (on supported devices) and better memory management. On many older devices, a stripped-down Pie ROM runs faster than a bloated stock KitKat ROM. This is the only way to get Android 9
Reboot directly into TWRP recovery using your device’s physical button combination (usually Power + Volume Down). Step 3: Download Android 9.0 ROM and GApps
To help narrow down the process for your specific hardware, let me know: What is the exact of your device?
If the device keeps restarting, go back to TWRP and factory reset it again.
Select Install > choose the ROM zip file > Swipe to Confirm Flash .