Firmware, in the context of the ZTE A31 Plus, refers to the low-level software embedded in the device’s hardware components. It includes the bootloader, the Android operating system kernel, hardware drivers, and the vendor-specific modifications that ZTE overlays onto the stock Android Open Source Project (AOSP). Unlike higher-end devices that run feature-rich custom skins, the A31 Plus typically runs a near-stock or lightly customized version of Android Go—a streamlined OS designed for devices with 2GB of RAM or less.
The ZTE A31 Plus runs on Android 11 (Go edition) out of the box. The firmware version is usually denoted by a build number, which consists of a combination of letters and numbers. The build number for the ZTE A31 Plus is: zte a31 plus firmware
Reverting to a previous version if a new update causes compatibility issues. Official vs. Manual Update Methods 1. The Official OTA Method (Recommended) Firmware, in the context of the ZTE A31
Another contentious issue is the unlockable bootloader. For enthusiasts, gaining root access or installing custom ROMs like LineageOS could extend the device’s life beyond ZTE’s official support window. However, ZTE’s firmware locks the bootloader by default and does not provide an official unlocking mechanism for the A31 Plus. This decision prioritizes security and warranty control over user freedom—a common trade-off in budget smartphones. The ZTE A31 Plus runs on Android 11