H1B Transfer Query

[dl280819]

Hi All , 

I am working with Company A and having H1B validity till 2020 . I have an offer in hand with company B and would like to join the company after the H1B transfer process gets completed . But before i got the offer from Company B ,  I had made some travel plan to India In dec 2017 and will be back in Jan 2018 . Please advise on the followings 

1) Can I travel to India Dec 2017 and comes back in H1B petition from Company A while the transfer process with Company B is under process with USCIS ? I am planning to resign from Company A after I come back from India in Jan 2018 . Please advise

2) Can the H1B Transfer Process be started while I am in India on Vacation ?

3) If my H1B Transfer is approved with Company B while i am in vacation in India but I will resign after coming back from India , Will there be any issue in immigration ? Please advise 

Thanks