unexplained excess data use in uk

[DiDawson]

I'm in UK on a 3GB data plan. I work at home so am on WiFi all day/night. Normal data usage is less than 1GB. Feb/March was over 10GB. Mar/April over 9GB already. I've rolled over data from Piggybank last 2 months but can't explain the excess data usage.

Any ideas?

[63johnw]

Hi @DiDawson  have a look at your phones data monitor and that will show which apps are using the most data. 

[PandJ2020]

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@DiDawson wrote:

Any ideas?

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Your phone will have counters that will record which app is using the data.  (You may need to reset them)

[DiDawson]

Thanks both. I checked and App Store was using most and yet I only use it once, yesterday for the first time this year? Anyway I also noticed Data Roaming was using data. No idea how/why, so I turned it off. All very odd and still no explanation as to what has changed recently.