My H1B application status is still "CASE WAS RECEIVED" , how long it can take to get confirmation

My H1B application status is still “CASE WAS RECEIVED” ,

how long it can take to get confirmation

What is maximum time USCIS can take

and should i consider Premium processing …

This time its taking longer time than usual time.

just wait, if not you can convert to premium processing.

“Just an opinion”

My case is also still in recived status

yday my status is changed now it is “Notice Explaining USCIS’ Actions Was Mailed”

Can any one explained , what it means