it is permissible to enter as an H and change to F, CIS indicates they are taking about 2.5 months to make a decision.
Attorney Robert Brown's (former INS Director, 1972-99) reply to your question is general in nature, and does not constitute legal advice as all facts are known to him. For specific advice or representation you should retain an attorney experienced in immigration law. Mr. Brown's reply on AVVO does not create an attorney/client relationship not constitute legal advice.
You can seek to change your status but will need to pay a visit to the consulate to get a visa once you are outside of the USA and want to return on F visa.
The information contained in this answer is provided for informational purposes only, and should not be construed as legal advice on any subject matter,not should it be viewed as establishing an attorney client relationship of any kind.
Once you are in valid F-1 status, you are eligible to be employed on campus only. You do not need a visa in your passport, just the new I-94 card sent with the change of status approval. You can change your status to H-1B in the future without having an F-1 visa in your passport, but if you leave the US for any reason, you must get the appropriate visa to return from a US consulate overseas.
You appear to be concerned about your lawful stay in the United States and wish to remain in the country legally. If that is in fact correct, delegate any of your issues to the counsel of record, as legally appropriate in this situation.
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