H1B Valid Till Sep-10_Help Me_Urgent!

[mhkraju]

Hi.....I am from India.

In 2007 I got my H1B visa stamping valid till Sep-2010 from a US company A.
In 2008 I joined company B in India and got my H1B transfered hence got a new approval (I-797) valid till October-2011.
Now I joined company C in India.

Till now I didn't travelled to US due to recession.

Questions:

1. Now can I enter US through company A without any problem?
2. At port of entry can I show my new I-797 to get I-94 till Oct-2011?
3. I don't know whether my new I-797 has been revoked by company B or not, even I didn't received any communication regarding that. How to check the status of my new I-797?
4. If my new I-797 has been revoked then will it be a problem at port of entry?
5. If I enter US in Feb-10 or Mar-10, can I get it extended as my stamping is getting expired by Sep-2010?

Please help me on these queries.

Best Regards,
M H K Raju.

[txh1b]

1. Provided the offer from A still holds good and you get a new offer letter now from A.
2. No as the petition from A is valid only until 2010.
3. Does not matter as you cannot use B's petition and work for A.
4. Depends on whom you want to work for. If it is A, all that matters is A's petition. Each H1b petition is independent.
5. A has to file for an extension after you enter the US.