You will need a computer to send commands to your Android phone.
Instead of forcing a 10-year-old phone to run Android 9.0, consider:
Here is the first major roadblock. on 99% of phones. Manufacturers like Samsung, HTC, LG, and Sony stopped providing updates after 2 years.
Upgrading from Android 4.4.2 to 9.0 via official means is impossible. Manufacturers typically support a device for 2–3 years at most, and no company provides OTA updates spanning five major versions. upgrade android 4.4.2 to 9.0
Force restart (hold power button 10 seconds). If it loops again, go back to TWRP, wipe data, and reflash. If still stuck, try a different ROM.
A custom recovery replaces your stock recovery menu, allowing you to flash custom operating systems.
Use the physical volume keys on the device to select "Yes" on the screen confirmation, then press the power button. Step 2: Install a Custom Recovery (TWRP) You will need a computer to send commands
You will need to install a custom recovery (like TWRP ). Method 1: The Custom ROM Route (Recommended)
Download the appropriate .zip file from OpenGApps.org (select ARM, Android 9.0, and "Pico" or "Nano" to save system resources).
Upgrading Android 4.4.2 to 9.0: The Ultimate Guide to Reviving Your Old Device Manufacturers like Samsung, HTC, LG, and Sony stopped
Swipe the slider at the bottom of the screen to execute the format process.
Before we dive into the upgrade process, let's quickly discuss why you should consider upgrading to Android 9.0:
Once the device screen displays the fastboot interface, run the universal unlock command: fastboot oem unlock Use code with caution.
After flashing, tap (optional but recommended).