Data usage in middle of the night

SJ4c0b5
Member

My iphone 6 suddenly seems to be using dat in the middle of the night while connected to our home wifi. "fetch Data" is off, I make sure to close all web pages and apps before going to sleep, yet for the first time in years I get a notification that we have used 75% of our data with half of the billing cycle left.

Would appreciate any help on this matter.

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