[Arnavion]

>The same probably goes for other MVNO carriers such as Mint and Ting. The PII and billing data is with the MVNO carriers.

Are you sure? In the previous T-Mo breach Ting claimed the opposite.

https://help.ting.com/hc/en-us/community/posts/4405384603291...

>the kind of Ting Mobile customer data at issue in this data breach is not stored on T-Mobile servers. Ting Mobile holds its own customer database on our own servers. The kind of data T-Mobile does have access to are things that are network-specific, like your phone number, SIM card number, usage data, and IMEI.

>T-Mobile does not have access to the Ting Mobile database of names, email addresses, credit card information, etc. Your information is protected and secure from what the hackers claim to have collected.

[kornhole]

Thanks. I was not sure. MVNO contracts could differ. This gives me more reason to hide my identity by using SIM cards carefully.