问题描述：
我要在上海办H1B签证，我想问一下预约电话是多少。然后除了公司寄给我的一大堆美国那啥部批准H1b请求啊什么的资料以外，我还需要额外准备什么材料呢？
还有就是啊，一般vo会问一些什么问题啊，有没有我要特别注意的，呵呵。
越详细越好，谢谢各位了！
问题解答：
预约电话号码是 4008 872 333
以下根据网友提供的信息总结出的H1b反签需要的材料清单。本文只用于信息参考，具体权威信息请咨询您的移民律师或者美国使馆。 祝签证顺利，旅途愉快.
1. Completed Non-immigration Visa Application Form DS-156. Separate form for each applicant.
2. Completed Form DS-157.
3. Original H1 approval form I-797.
4. All other legal papers you received with your H1 documents, like from I129.
5. [removed]
6. Application visa fee original receipt
7. Offer letter (or Employment Verification letter) from the company in USA.
8. Valid Passport.
9. Original Experience Certificates from all your previous employment's.
10. Two photographs 2 and 2 inches square (50 mm square) for each applicant, showing full face, without head covering, against a light background. To be used in the application Form. US consulates are very particular about the Photographs specification.
11. Latest resume.
12. All your Original Degree Certificates.
13. All of your I-20s used in US.
14. Your OPT EAD card used in US
15. Your past 6 months pay stubs and last year's W2
16. If you have a research job, especially on a sensitive area, make sure you bring a research statement which explains what you do and what your group do in the research. If you are working in a university, bring your boss' information too.
17. if you have changed your immigration status during your stay at US, bring all approval notice from USCIS。
建议：
1. 所有有用的材料一次递进去。
2. 不用害怕，不用紧张，保持冷静
3. 如一位先驱所说的，H1B想要被拒都难，最多时check
4. resume, support letter, papers中所有能和敏感专业扯上关系得字眼都去掉
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