nkm-oct23 said:At one time a person can have only one valid visa in his/her passport. At the time of issuance of a new visa, all other visas will be canceled.
JoeF said:That's wrong. You can only have one status in the US, but you can of course have multiple valid visas in your passport.
For example, I had an H1 visa and a B1/B2 visa in my passport. I just used the H1 visa to enter. But the B2 visa remained valid.