You must understand about visa and status.
The word visa is often misused. A visa is, in effect, an admission ticket. You get it at a US consulate and use it at the airport, seaport or land border crossing when you enter the US. You usually also need it when boarding your flight or ship. When you arrive in the US, the BCBP immigration inspector will look at your passport with the visa in it and grant you a corresponding status.
After you arrive in the USA, you do not need the visa at all, ever! In fact, there are many people whose visa expired or whose visa is of a different category, but yet they are perfectly legally in the USA.
A status is what you have after you arrive in the USA, until you leave. People outside the USA never have a status.