I got H1B stamping in Nov-2010 for employer A and it is valid till Aug-2013. I came to USA on Mar-2011 using the employer A H1 stamping & Visa. In Dec-2011, I moved to an employer B and got my new H1B I-797 and I-90 which is valid till Dec-2014. Current model is Employer – Vendor – Client. I have a situation and need to visit India in Dec-2012. My attorney and employer said that I could use my existing H1B stamping which I got from employer A which is valid till Aug-2013. And while returning show the new H1B paper and get the I-90 according to new H1B petition. With your best experience please advice whether is it ok to go to India and return using previous employer visa stamping and new employer I-797 or is there any risk involved in it now a days. Please advice what other pre cautions i need to take. Thank you.