You should be able to see what's been using it via Settings (Mobile data). It may have been struggling to get stuff on wifi and switched to mobile.
Or it might be a naughty app; I would look at what's been using your battery as an index of what's been most busy. You could also turn off their ability to work in the background and reintroduce apps one at a time. You can also turn off mobile data for apps (google that, for instructions).
I gather Whatsapp have just introduced ads? (I don't use it). That would be a good place to start.
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Cheers,
Jason
On Jun 20, 2025, at 10:11 AM, 'Jason Davies' via Sussex Mac User Group <sm...@googlegroups.com> wrote:
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what was the offending app, by the way? Useful to know for future such scenarios.
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Cheers,
Jason
On Jun 23, 2025, at 8:53 PM, 'Jason Davies' via Sussex Mac User Group <sm...@googlegroups.com> wro:
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