Sudden high data usage

[Gareth7]

Just a few days into my billing period, MyO2 says I've burned through my entire 15GB of data for the month, but I haven't done anything unusual and my phone says I've only used 2.5GB in this period. I've seen people reporting a similar issue in the past but with no specific cause identified. Due to the time of day, I can't get through to the support line. Anyone else had this issue recently and been able to resolve it?

[pgn]

If your phone data meter is set to match the amount of data you have in your allowance, and set to zero on the day your bill is issued, I would put it down to a funny with MyO2. Check app and online match, and then check again next week. If you have just upgraded, it will be all over the place for that month, @Gareth7.

You can contact O2 via Social Media, links just below, and persist until you get an answer. Good luck.

[jonsie]

We are getting a few of these again recently

[Enlli]

This appeared recently. But no feedback from OP

https://community.o2.co.uk/t5/My-O2/Data-allowence-used-in-less-than-2-days/m-p/1788048#M30983