Simcard regularly connects to internet

Hello @Eluria and welcome to our o2 community :-)

If a mobile phone is connected to a wifi network this does not automatically means that it will not also connect to a mobile network. Modern phones offer several features and settings and sometimes also special apps that will access a mobile network even if a wifi connection is establihed. There may even be malware that totally ignores any settings that a user makes.

Since we do neither have access to your phone nor lies it in our responsibility to make sure that a device is set up in the way that you want it to be we will not be able to offer a refund.

A possibility to avoid the phone accessing the mobile internet would for example be to remove the SIM card or ask the customer service if blocking the mobile internet would be a possibility. 

Regards,

Lars