If an update is available, follow the prompts to download and install it.
Move photos, contacts, and documents to a cloud service or a PC. upgrade android 4.4.2 to 9.0
You will need two separate zip files stored on your device's internal storage or MicroSD card: If an update is available, follow the prompts
Do you have access to a to assist with the upgrade? If an update is available
Place the downloaded image into your Platform-Tools folder, rename it to twrp.img , and execute: fastboot flash recovery twrp.img Use code with caution.
Backup contacts to your Google Account or export them as a .vcf file. 3. Step-by-Step Upgrade Procedure