Do I need to go to VISA stamping again if I change the employer before coming to USA?

I agree with my colleagues. Contact your company's US immigration attorney.

Does changing employer have an impact on spouse's H4 EAD if I-140 is revoked?

I agree with my colleague. Contact your company's US immigration attorney for assistance.

Considering the time constraints for motion to appeal, can I apply for a fresh F-1 visa from my home country without appealing?

I agree with my colleague. You may re-apply and address the issues in the denial instead of appealing. You will receive a much quicker response. ...

Selected as the best answer

Can We use other approved H4 with other employer but didn't join him at all.

I agree with my colleague. Contact your company's US immigration attorney for assistance.

Along with 2 pictures for I-485, do I need to submit separate pictures with G-325A ( of me and my petitioner)?

I agree with my colleagues. Yes, include the pictures. Contact a US immigration attorney for assistance.

Hi, I entered US in Jan 2015 on H4 visa however got H1B sponsorship from an employer(consultancy) and H1B was picked in 2015 lot

I agree with my colleagues. Contact your company's US immigration attorney for assistance.

Is it better not to move until I get the new card? or is that not an issue?

I agree with my colleagues. File the online AR-11 at www.uscis.gov once you move.

What happens to the person after he is denied at immigration (port-of-entry)? Does he have way to reach to outside world?

I agree with my colleagues. Contact USCBP for information (if any) if he doesn't exit the airport in the next few hours.

Would I still be able to apply for H1B so that I can stay in US?

I agree with my colleague. Contact a US immigration attorney for review.

Is there a way I can apply for my son and gets him a green card too?

Contact a US immigration attorney to review family-based and independent filing options for your son.