You should get information about FP by checking AVM
I think once they approve or fix a date for FP there won't be any change in AVM.Am i correct?
No, I don't think so. According to some previous posts once INS schedule your FP and send out the notice to you, the message in AVM should change accordingly, though I don't know the details (I am still waiting for this change and will let you know once I heard it), but quite sure it will change and will mention that a notice for scheculed FP has been sent to you, etc. etc.