The same reason compact discs cost way more than cassette tapes when they came out even though they were cheaper to manufacture - people will pay for perceived

The same reason compact discs cost way more than cassette tapes when they came out even though they were cheaper to manufacture - people will pay for perceived value not the actual cost. Its very convenient to use vowifi vs getting a local sim and not receiving calls or SMS on your home number. Telcos can offer it as they already need the infrastructure to do voice & messages over 4g anyway.