Queue big downloads for wifi instead of letting them run on data
App and OS updates are usually the biggest data users nobody notices. Fewer than five independent reports so far, so it is still unverified — try it and file one.
Why it works
Most phones default to allowing app and system updates over mobile data, and those updates are often hundreds of megabytes with no visible download happening. Restricting updates to wifi-only removes the single largest source of background data use.
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