The call operates for Three. Aside from tthe fact they cant speak particularly great English, the fact they leave you shitty voicemails when its clear that its them calling about an upgrade and that they dont call back even close to the time they say they will, they all offer you different upgrade deals. Surely somewhere they must have a script to stick to. They seem to be getting worse as well. Going instore to try and get a better deal with someone who can actually say my name, not holding my breathe though.