To flash Alcatel OT-7024W official firmware downloaded from this post, SP Flashtool is required. Flashing instructions can be seen at the end of this post (immediately below download options).
As always, we advice that you notify us if the download link contained in this thread is broken, so the file url will be updated.
Alternate Download Links
To flash this firmware, follow instructions here https://www.leakite.com/2016/03/easy-mtk-firmware-flashing-installation.html