Stamping from Company A and Company B has transferred my I-797.

That's a question to be answered by the company's immigration attorney who was hired for that purpose. Good luck!

Consult about K3 processing time and working requirements?

With either K-1 or K-3 you would need to first file a petition I-130 on his behalf. When the petition is approved then you can go ahead and file...

Whats faster and easier for approval: Getting a K1 Visa for my fiance or traveling there and getting married and doing the I130?

We need a lot more information from you. To begin, I assume you're a United States Citizen? If so, the quickest way would be K-1, because entry on...

What are the things and documents to be taken care of, when reentering US first time as a conditional Green card holder.

Your green card and valid passport along with record of roundtrip ticket if possible. You should have no issues otherwise.

Can some lawyer make explain the reason for me about joint sponsor document? Thanks a lot

If he has a family of 4 you will be the 5th (or 6th, if he has 4 people aside from him).

I highly encourage you and your wife to consult with an immigration attorney.

If I have been legally deported from the United States can I get my criminal record expunged and apply for some kind of asylum?

You have given no information that's valid to determine and options for you. That being said, you need to contact an immigration attorney in...

Over stayed visa.

Unlikely. That being said, you did not give enough details to even begin to answer this question without speculating. I encourage your friend to...

A petition got rejected by a consulate and the USCIS has been reviewing the case for 5 months. Can I do anything to expedite?

Have your tried contacting USCIS and inquire speaking to a tier 2 officer? In the future, it is highly recommended that you use an immigration...

Does stamping a second visa for the same country (USA, J-1) renders older visa (USA, B-1, expiry 2017) invalid automatically?

No but you should use the correct visa to enter the USA (When your J-1 expires you can use your B-1)