Cellular data discrepancy between History and App tracker...

ellisina4 10 months ago • updated 10 months ago 0

I have been struggling with one of the phones on
my account having abnormally high cellular data use even though that
phone is primarily on WIFI. 

I installed the data manager app and used it for a week.  Today I saw what is depicted in the attached pictures:
History is showing about 3Gb of cellular data used and on the app page it shows almost nothing.
Please help