As far as I know some custom ROMs support GPS spoofing, either with fake data or blocking it. But instead you usually get worse camera drivers and some security

As far as I know some custom ROMs support GPS spoofing, either with fake data or blocking it. But instead you usually get worse camera drivers and some security features may stop working. All of this doesn't matter for network providers since they will always have your location data, by design of GSM network.