Urgent! H1B to B2 after laid off?

omvpe

Registered Users (C)
I will be laid off August 22.
To stay further legally, I wonder what's the best for me to do.

1) Can I change my status from H1B to B2 by filing I129 and I539?
Is it OK to file them before my being laid off or I have to file as early as possible?

2) If B2 is not a good way, how long can I stay without causing trouble?

Thank you in advance.
 
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