My husband is discussing business with a distributor in Oman for work in several African countries. The Omani distributor apparently stopped getting texts. My husband was told to get a VPN. My husband is dutifully beginning to look into a VPN. He knows even less about these matters than me, a scary thought, so I am coming here for advice. Is there any reason for him to use a VPN when he is in the US? How does using a VPN aid communication?