How can you get work on an H4 visa?

H4 visa holders are not allowed to legally work. H4 is a derivative of an H1 visa. H4 visa holders are allowed entry to US because they are dependents of H1 visa holder. H4 visa holders are not eligible for Social Security Number. H4 visa holder may apply EAD only if filed concurrently with the principal's (H1 Visa holder) I-140 petition OR if principal's I-140 petition is pending or approved. H4 visa holders are not allowed to work legally. H4 is a derivative of an H1 visa. H4 visa holders are allowed entry to US because they are dependents of H1 visa holder. H4 visa holders are not eligible for Social Security Number. H4 visa holder may apply EAD only if filed concurrently with the principal's (H1 Visa holder) I-140 petition OR if principal's I-140 petition is pending or approved.