My H-1 B visa stamped for an employer A is valid till Nov 2010, I switched job to employer B with COS and petition approved till NOV 2011. My wife has an I-140 pending through her employer ( she is on H-1B). I have gotten in to a PhD program staring Fall 2010. Can any one please guide me how soon can I apply for COS for F-1.I have been told if MY COS application is reviewed more 30 days before the starting date on I-20, it will be denied since I cannot be in the U.S. in F1 status more than 30 days before 9/1/2010. Is it true, is there a way around it.My six year H-1B is getting over on Nov 2011 and I would need to have a I-140 filed before Nov 2010, in case F1 is denied.