If only the customers knew of the unpublished GSM setting in the HLR that forces all calls to not be anonymous. :-) I had it when I worked in the cellular ind

If only the customers knew of the unpublished GSM setting in the HLR that forces all calls to not be anonymous. :-) I had it when I worked in the cellular industry. Sales companies and scammers despised it. And yes, if you had your own SS7 link, you could spoof caller-id, but that could be fixed with a law by holding telco's accountable for mismanagement of their SS7 signalling network and bumping switches off the network that repeatedly violate policies.