Probably not. The "Core" series rarely has custom development due to the locked bootloader and proprietary camera blobs. If you find a custom ROM, ensure it explicitly lists "Blade A33 Core."
Hold down the button (or on some regional variations, both Volume buttons simultaneously). Firmware ZTE Blade A33 Core
Click on the (Load Packet) located at the top-left corner of the tool interface. Browse your files, navigate to your extracted firmware folder, select the .pac file, and click open. Wait a few moments for the tool to finish loading the file structure. Step 5: Boot Device into Download Mode Probably not
