can H4 EAD be filed with primary holder H1B transfer while you have H4 EAD currently ??

[sree.universal]

I am currently working on H4 EAD. If my spouse who is the H1B holder makes a switch to another Employer, will I be able to apply for H4 EAD simultaneously along with my spouse H1B transfer? 

[satya2k1]

It depends on your H4 EAD validity date.  If your H4 EAD validity is same as your spouse H1B validity then Yes, you have to apply for H4 EAD along with your spouse H1B transfer.

If your H4 EAD is valid for another 2 or 3 years, then you don't have to file for H4 EAD again.