I am on H1B in US . I have recently changed by employer from A to B . I have EAD and AOS pending from employer A . Employer B has still not filed AC21 . I need to travel international but due to some reason i do not want to do that on H1B . Can i do it enter US in EAD from employer A and continue working for employer B ? In case i enter US on EAD , IS MY H1B STILL VALID ?