Google feature and not working did 4 factory resets

[AC Question]

I have now done a factory reset on my phone 4x the first of the for the ok Google feature work fine then it died on me so I did a factory reset to no avail another factory reset and then the other none of the research have corrected the issue. This happened before and there was some setting and I can't remember what but there was one setting that I had to change for it to work. Does anybody have any idea what that setting might be because I've gone to the settings page tried to create the voice model and it won't respond every time I say ok google it just stays where it is on the first one of three times that you're supposed to say it

My phone is a ZTE grand X max Plus with Android 4.4 may be classified as five not sure