Fingerprint Status Check
Finger prints taken at USCIS goes to FBI for back ground checks. FBI is very efficient and processes and sends it to USCIS within 3-4 weeks. Once your fingerprints are taken, you can check with FBI whether your back ground has been checked and your fingerprint report has been sent back to USCIS or not. FBI does not tell whether the fingerprints were rejected or whether they found anything negative about you.
FBI can be reached either at 304-625-5590 or at 304-625-2406. They are located in West Virginia and it is the same number for whole of US. If the representative comes to the phone, he/can tell you about your case immediately or no one picks the phone, you may leave the message giving your spelled out name, contact phone number and Alien Number, (also called 'A' number. This is number is in the I-485 receipt notice and also in the Finger Print notice). They are usually prompt in returning phone calls.
If FBI can't track your details, you may need to contact your Local USCIS where you were fingerprinted to find out the status.