> This is very different from buying your data from a company especially when the user consented to their location being tracked.
No, it's not 'very different'. When you sign a cellular contract you consent to all sorts of tracking and data collection, but it still requires a warrant for government to obtain.
You don’t actually consent (per-se) in most cases. Hence the warrant.
If you consented, no warrant would be required.
Is it materialy different than a landline (in the rights signed away, not the data emitted/captured)?