COS from B2 to F1

What documents are needed?
I-539, I-20, what else? Is bank statement needed?
Will they do interview?
I-94 will expired in 2.5 months, do I have enought time?

Thank you for the help.

所有跟帖： 

• 回复：COS from B2 to F1 -pjiang- ♀ (547 bytes) () 05/07/2009 postreply 16:02:17

• Thanks, summarize the list, one more concern -claireub- ♀ (680 bytes) () 05/07/2009 postreply 20:50:09