There are two primary ways to update or restore this firmware:

This paper provides an in-depth examination of the native firmware associated with the Spreadtrum (UNISOC) SP7731E chipset, specifically targeting the "1H10" hardware revision often found in entry-level Android devices. As the bridge between hardware capabilities and software application, the native firmware plays a critical role in system stability, peripheral management, and performance optimization. This document dissects the firmware's file structure, boot sequence, kernel integration, and driver architecture, offering a technical reference for developers, repair technicians, and embedded systems engineers.

Navigate to Settings > System > System Upgrade and select . The device will reboot and begin the "native" installation. Method 2: Research Spreadtrum Upgrade Tool (For Recovery)