T-Mobile does not require any identification to get a prepaid phone line. You can submit whatever name you'd like for the line. There's no SSN requested either.

T-Mobile does not require any identification to get a prepaid phone line. You can submit whatever name you'd like for the line. There's no SSN requested either. Any requirements imposed at a local store are specific to your State. If you really want to get one without providing any PII, get the line in a different State. Not providing information is the first step of limiting the blast radius of data leaks.