I am unable to turn off mobile data for some apps. Facebook, Cotap, Youtube and some others. Yet some of the apps I can turn mobile data off for e.g App Store.
I recently upgraded to 8.4.1 on my iPhone 4s.
Any one have any ideas?
IOS – Mobile data not turning off for some apps iOS 8.4.1
cellular-dataiosiphone
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Best Answer
There's a bug which occurs sometimes where the CellularData.db is corrupted/malformed and iOS can't write the preferences to it.
You can fix this by deleting the file, located in
/var/wireless/Library/Databases/CellularUsage.db.Source: Fix cellular data app preferences not being saved on iOS 7