> What I am saying is that mobile networks don't share any of this data with telcos. I'm not asking for any new data to be shared from mobile networks to landl

> What I am saying is that mobile networks don't share any of this data with telcos. I'm not asking for any new data to be shared from mobile networks to landline telcos. You haven't explained why you think that is required in order for mobile networks to perform sanity checking (or sanitization) on the data they're already sending to other telcos during call setup.