H1B Visa transfer Company B when it has been cancelled from Company A.

[aanandkalai]

Hi -
I am working with Company -A in India and my H1B Visa is still valid. Now I got an offer from Another Company B in India. I need to Transfer my H1B Visa from Company A to Company B. Now I have only 1 month of Notice period with Company A and I need to ask Company B to Initiate the Visa transfer process.
Please help me with answer the below quires.

Note: Company A Will Cancel My H1B Visa immediately after I Quit from the Company and will take all the Visa documents.
1. I did not get in to USA with H1B after get it stamped. Is the Visa transfer is possible when I am not visited once while I am in India? Both company A and B are in India.
2. When we can initiate the Visa Transfer Process? After Joining Company B or Now itself we can initiate the Process?
3. How long it will take to get the approval for H1B visa transfer?
4. If company A will cancel my Visa, How long it will take to cancel, I mean up to how long my visa will be valid and I can initiate my Transfer process.
5. If the Company B Just initiates the process and immediately company A applied for cancel my H1B visa before I get the Transfer approval, Is this will impact to the Visa transfer process and I There is any chance to reject my Visa transfer?
6. Please suggest me what I should do in such case?

Thanks In Advance.

[kabkaba]

Your new employer can file a cap-exempt petition for you at any time. All they will need is a copy of the previous petition approval notice or at minimum the receipt number for that petition. Everything else is immaterial.