To ensure you are downloading the correct firmware, verify your hardware matches these core specs: : Unisoc SC9832E (28 nm) Quad-core 1.4 GHz. Memory : 32 GB Storage with 1 GB or 2 GB RAM. Display : 5.0 Inches, 480 x 854 Pixels. Battery : 2000 mAh. How to Maintain Your "Best" Firmware
If you need to manually install (flash) the firmware, you will typically use the following tools: firmware zte blade a33 core best