Daily charge

[Daisy2]

I have a new iPhone which I am still learning to use. It is connected to my home internet and I have not used it outside the home. Why am I being charged £1 a day for “data”, as yet I have made no phone calls or texts except 1 test call to my home phone to check that it worked! I honestly thought there was no charge for internet use if connected to a network 

[MI5]

If you lose wifi your mobile data will take over and the charge will be applied. Even a tiny amount of data will cost you the daily charge.

[Daisy2]

Is this just with pay as you go or all tariffs?

[MI5]

The data use will happen on all tariffs but you only see the web daily charge on PAYG.

[Daisy2]

I never lost wi fi and never left the house but while mobile data was turned on I still got the daily charge. Does this mean that on any tariff with any supplier you must turn mobile data off even when always using wi fi

[MI5]

Yes if you want to be safe.
You must have very briefly lost wifi for the mobile data to have been used.

[Daisy2]

Thanks for the replies but something doesn’t make sense here. Sorry to labour the point but every time I had a practice on my new phone I was careful to note that I had wi fi connection. Certainly  mobile data wasn’t switched off as I was unaware that it should be. I had been assured that wi fi would take over from mobile data. Does everyone switch mobile data off when working with a wi fi connection

[MI5]

Not everyone bothers to turn off mobile data, only those who get charged per mb would need to.
If you have a large data allowance it doesn't matter if a few mb's get used occasionally unintentionally.

[jonsie]

Hi the problem with iphones is that when the phone is in sleep mode, wifi switches off and mobile data is used. By turning mobile data off, it won't connect and charge you.