I am already in US, sorry I didn't make it clear
-----------make it clear
Hi, I changed status from F to H-1B.
----------did you got H1 approval with I-94 attached(lower right side of approval notice)?
My visa is already expired.
----------do you mean F1 visa stamp in passport is expired?
So can I travel outside the U.S.
---------- you can go out of US
while I am in the H-1B status, and if I do leave U.S., do I have to get a new visa?
------------- if you dont have VALID H1 visa stamp in your passport then you need H1 Visa stamp to enter US.
.