Effective March 7, 2011, new H&L category visa appointments are no longer available at the U.S. Consulate General in Mumbai. H&L visa appointments may be scheduled in New Delhi, Chennai, or Hyderabad through VFS. More information is found here.
FAQs: H-1B visa transfer before arrival into the USA|| Employee paying for green card and H-1B premium costs || Using an old H-1B visa stamp of a different employer