I applied for extension of my H4 visa recently. On contacting the USCIS, I was told that my visa has been approved and the approval notice has been mailed to me. It has been over 30 days since they posted it to me, but I am yet to receive the approval notice. Apparently, I will need to apply for a duplicate of my approval notice as USCIS thinks that my approval notice might have been lost in the mail. Meanwhile, I have been admitted to a university to pursue my masters and was hoping to start studying in F1 visa from fall(sep) 2012. Given the current situation with my H4 visa, will it be possible to apply for my F1 visa without waiting for my approval notice or should I be applying only after I receive my H4 approval notice?