I know this is very common question being asked. But my situation is:
I came to US on H1B sponsored by employer A from India. H1B petition was valid till September 2016. Visa and I-94 is also valid till September 2016. After coming here, I changed my employer and now have new approved H1B petition but it is valid till January 2016 which less than my old H1B petition with employer A. I am going to India in June 2015 and returning in July. So do I need to do restamping or can I enter in US with old but valid visa?
I appreciate your help!!