Alright... Mine was file by my wife and field center Texas.
My case got approved after 308 days, approximately 10 months, although I had RFE for my marriage certificate which was submitted to the attorney before approval.
I know how depressing and traumatizing the waiting time feels.
Am awaiting my interview since last 4 months I got my case documentaryly qualified by NVC and sent to my country consulate.
Be patient, in less than two months you case will be approved.
You can download lawfully app to track your case easily instead of logging in to USCIS site anytime you want to check.