H1 with One company and EAD with new company

[H1EAD]

Here is a complex situation,

I have 2002 priority date approved labor and I-140 with company A. Since EB3 is not current i am unable to apply for I-485 with A.

With Company B i applied I-140 & I-485 as future employee using substitution labor in EB2 today.

1)Say if i get EAD with company B after 90 days. Do i have to leave company A??

2) Can i stop using H1 of company A and work there with company B's EAD.

Any help is appreciated

[immihelp]

You can work for company A on H1 until it expires.

You can work for company B on EAD until it expires.