Feb 20th 2025 : One of our clients family got visa approved (H1B & H4) at Monterrey, Mexico, working in IT as Contractor & got i-797B through consular processing from USCIS Difference between I-797A & I-797B is i-797A usually have i-94 attached to it, I-797B does not have i-94 attached to it, it's mandatory to travel out of the country asap and get it stamped and can come back to continue the work