Here are the details regarding the firmware for the ZTE Blade A51.
This is the industry-standard flashing tool for MediaTek devices. firmware zte blade a51 hot
The ZTE Blade A51 is a durable, if unspectacular, device. Its firmware is the glue that holds it together. If your phone is bootlooping, flashing the stock ROM via SP Flash Tool is your best bet. Here are the details regarding the firmware for
preloader.bin, boot.img, system.img, vbmeta.img, etc.