When you called customer service today did you tell them that its been 43 days since you file ur case but have not receive the bio letter? You can ask them if the bio letter was generated and mailed out. Since its been over 30 days they should be able to tell you if it has or hasn't. When I called USCIS they were able to tell me when it was mail and when my appointment is. I'm not sure what the infopass will accomplish because all the questions you have can be answered by calling customer service and requesting to speak to a tier 2 rep. My file my case on January 25, 2012 and got my bio letter about 3wks later so its unusual if you haven't received urs after 43 days unless there is a backlog in processing EAD cases at ur service center.
USCIS typically sends out biometrics letter within 30 days of receiving your application. You should call USCIS customer service and request to speak to a tier 2 IO. He will be able to tell you the date the letter was sent out and when your appointment will be. I had to learn it the hard way because I never follow up on my biometrics letter and thus my case was considered ABANDONED and DENIED so now I have to start the application process all over again including service fee.
aaroncali5 got a reaction from Ash&Dave in How long should I wait for the biometrics letter