I just want to have a phone number for personal use and one for my professional use

When you click on the hamburger bar

Can you elaborate But how private your data really is, that might be hard to answer

Is there a limit to one-time cards.

If I am on the bus and want to browse through trash or content available offline, would it be nice not to share it with a potential person looking over my shored. Its not a big thing but would be nice