I have a H1B aproval valid till 2.5 yrs from 1st Oct'12 but i never traveled to US. My employer told me that I may need to wait for one entire year to travel. So now I wanted to switch, but i dont want to waste my H1B. Is it possible to use this approval notice to travel to US from some other employer by doing some amendments in it. I confirmed with many friends 50% told me i can do that and 50% said i cant. Please help me out here.