Excessive data usage

[RJ24]

I moved to O2 yesterday from Vodafone. I used to have a 15GB data limit and never used more than 3GB in a month.

Having activated my new O2 SIM around 9pm, and making no changes to the settings on my iPhone, I was surprised to see that I’ve used 2.4GB in 24 hours. I’m on Wi-fi at home and have done nothing differently.

This is seemingly not a one-off, as Google has thrown up a number of others on this forum with the same issue.

 What’s going on? I don’t want a response “turn off mobile data” or similar as I shouldn’t need to make any changes. Why am I so data hungry all of a sudden? The only change - literally the only thing - is moving from Vodafone to O2.

[MI5]

@RJ24 

I had the same issue on one of my accounts a few years ago.

O2 were not interested nor did they offer anything to help or investigate.

I actually moved that account to Vodafone and have not had any problems since, so my advice would be to go back within your 14 days, whilst you can.

[RJ24]

Thanks. You’re signature/bio doesn’t mention Vodafone at all?! You’re very active here (you’ve popped up in every post I’ve read) so what’s your link to O2?

[MI5]

I've no link to O2 other than being a customer.

The account I moved was the one I pay for my daughter.

[anticpated]

I can only fathom that data and your wi-fi are both active at the same time.