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Since 2 months ago I noticed that the cellular data usage increased tremendously. I reset the statistics and discovered that Document & Sync has used 3.3 Gb in 10 days. I can’t turn this future off from the Cellular menu.
Is this a known issue? Is there any workaround to stop this behaviour?
iPhone 13 Pro, iOS 15
When you are at home, make sure your Wi-Fi network works properly and turn off Mobile Data.
Mobile Data is used if you don't have Wi-Fi outside the house for synchronizing iCloud, e-mail, message etc.
Are you out of the house and want to use Wi-Fi see this Apple article: Use captive Wi-Fi networks on your iPhone, iPad or iPod touch
https://support.apple.com/en-gb/HT204497
You can also check which app use Mobile Data, go to Settings -> tap Mobile network -> scroll down to apps -> turn off per app.
You always need Wi-Fi or Mobile Data. if you're not on Wi-Fi, it will use mobile data.
Maybe you should check the Wi-Fi network?
See this Apple article: If your iPhone, iPad, or iPod touch won’t connect to a Wi-Fi network
https://support.apple.com/en-us/HT204051
Thanks for answering. But the problem is not the wi-fi connection. I want to configure Documents & Sync to stop using cellula data
I’ve already set up that! each time the iPhone connects to a wi-fi a shortcut turns off cellular data
a shortcut turns off cellular data
Call your carrier or stop by and ask them about your Data plan.
Document & Sync cellular data high usage
