回复:急!OPT失效,H1还没法递。

You must file COS (either F1-H1 I-129 or F1-H4 I-539) before the end of the grace period, or it is almost impossible for USCIS to grant you the COS (a new I-94 as the proof) because the end of F1 date is so specific and printed on your EAD.

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