H1 Transfer with Premium processing

[queryforh1]

Hi i work for company A on H1b visa
i got a new job with company b.
Company B is willing to do H1b visa transfer

My understanding is that normal Visa transfer process takes around 2 to 3 months.
Also until i get my I-797 (approval or rejection i cant work for company B)

Question-
1. If Company B does my H1b visa transfer in Premium processing ,
DOES THAT MEAN I WILL GET MY I-797 APPROVAL OR REJECTION IN 15 days???

is this understanding correct?
(i do have idea that if company b applies under normal processing , after i get my receipt of fess paid and document i can work for company B,
)

Q2- But what if after 2/3 months this I797 comes with Rejection?

Q3. in that case can i go back and work for Company A?? (If H1b visa transfer is rejected)

thanks a lot gurus...

[sk4ih]

1. Decision is taken in 15 days. It might be little late to get approval/rej notice.
correct.
2. You have to leave the company
3. Yes, if your old employer didn't revoke H1.

[queryforh1]

Thanks very much sk4ih for prompt answers

another question:

Q1. When you say decision is taken in 15 days, does that mean with my Fees Receipt and Case number in 15 days i can see that if Petition is Approved or Rejected???

Q2. If through case number i can see that H1b is approved, i can wait for little longer to receive that i-797b approval in Postal Mail.

thnx

[sk4ih]

1. Yes