With the Research Tool, you can perform a “Read Back” operation to dump partitions like persist , nvram , and prodnv (which hold your IMEI and Wi-Fi MAC). Always back up nvram first.

An official, user-friendly desktop application provided by ZTE for automated updates. Step-by-Step Guide to Flash ZTE Blade A75 5G Firmware Method 1: Local Update (For Working Devices)

fastboot boot twrp.img

If you have unlocked the bootloader (warning: may void warranty and break Widevine L1):

Power off your ZTE Blade A75 5G completely. Do not connect it to the PC yet.

Keeping your phone's firmware updated is vital for security, bug fixes, and performance improvements. For the ZTE Blade A75 5G, official updates are delivered Over-The-Air (OTA).

The firmware supports expanding the device's physical 4GB of RAM by an additional 4GB or more using internal storage, allowing for better multitasking with up to 8GB of total RAM .