Hi, My sister is doing her Masters and is on her H4 visa which is going to expire end of April. But, due to some issues in their marriage, her husband hasn't applied for the extension. She is planning on applying for Change of status to F1 which takes about 3 - 6 months for processing. My question is if she applies for a change of status and her H4 expires while the COS is in processing will she be out of status after her H4 expires? Any help will be highly appreciated. Thanks!!