1. Either way is fine. Don't surrender I-94 if by air.
2. No trouble, no record.
3. Should open, but better check before you go.
4. No difference.
5. Passport with previous visa, no matter what category it is, no matter it's still valid or not, valid I-94, valid I-20 for F1, I-797 for H1.
2. No trouble, no record.
3. Should open, but better check before you go.
4. No difference.
5. Passport with previous visa, no matter what category it is, no matter it's still valid or not, valid I-94, valid I-20 for F1, I-797 for H1.
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