In the context of smartphones, "Firmware" usually refers to the Operating System (Android). Unlike niche tech devices (like routers or drones) where you might manually upload files, updating a ZTE smartphone is handled almost exclusively through Over-The-Air (OTA) updates.

| Type | Description | Use Case | |------|-------------|-----------| | | ZTE’s original Android OS | Unbrick, restore to factory, remove root | | OTA Update | Incremental update package | System updates (not for full restore) | | Custom ROM | Third-party (LineageOS, etc.) | Advanced users, de-bloated Android | | SP Flash Tool ROM | Scatter-format firmware | For MediaTek chips (this device likely uses MT6762 or similar) |

Websites like FirmwareFile or AndroidHost are often the fastest source for old or rare ZTE builds. However, be cautious as many contain adware or require premium accounts.

Before flashing anything, backup your NVRAM (IMEI data), modem, and boot partitions.

If you simply want the latest official version without manual files: System Update Check for Updates

: Installs the latest Android security patches.