Your said:
"Normally, it'd be better to just change status within US. If you just go for F1 visa without the F1 apporval notice from USCIS, most likely you'll be rejected. Although it's not 100%, not worth trying it. For change status to F1, you get help from your ISO. "
Thank you so much!
Actually he has changed to f1 status. Does he need F1 approval notice from USCIS.
BTW, what is the USCIS?
Do you know anyone who got the third country visa successfully with the F1 status?