Travel while H4 EAD pending

Hi all

currently I am on H4 visa. Please answer my few questions

  1. Can I travel to India while my H4 EAD application pending ?

  2. Do I need some kind of stamping or biometric after EAD approval ?

  3. If I change my current H4 visa to another visa and later had to change back to H4, would my EAD be still valid or have to poly again?

  1. Can I travel to India while my H4 EAD application pending ?

Yes

  1. Do I need some kind of stamping or biometric after EAD approval ?

Yes

  1. If I change my current H4 visa to another visa and later had to change back to H4, would my EAD be still valid or have to poly again?

EAD will get invalid once you lose its H4 status