DOWNLOAD TECNO AB7 PHANTOM 9 (AB7-H618A-P-190419V148) FIRMWARE FOR FREE 

This is the stock firmware for Tecno Phantom 9 (AB7-H618A-P-190419V148). This firmware can be used to unbrick or fix software corruption in the phone. 

You can download the firmware directly from here : 

https://mega.nz/#!tw01lS4S!coym74MvAIwKiZ70uf9W7ZrYU9X_HeZj-YBXwWQxRCM   
(credits goes to original uploader : hovatek forum) 

NOTE: please, make sure you are certain that the above firmware is compatible with your phone before flashing it ; I will not be responsible for the bricking of your phone.