Read the approval notice, on which it states whether re-entery with visa stamp is required or not.
And also tear the new I-94 for your own keeping. If no I-94, you do need to leave and re-enter with visa stamp (to get a new I-94 upon reentry).
And also tear the new I-94 for your own keeping. If no I-94, you do need to leave and re-enter with visa stamp (to get a new I-94 upon reentry).