The guy in the interview said it would take from 1 - 2 months and now after 4 months nothing yet.
-file the Form G-731, - Inquiry About Status of I-551 Alien
Registration Card with your service center
I did not get any welcome letter and it looks like they do not send this letter all the times. I once was able to talk to an immigration officer and she said if it is an employment based then no welcome letter would be sent.
------------employment based cases that got approved after Interview at local office also get welcome letter once the file again reaches the service center in 10-15 days after Interview.
** where did you attend Interview?
** what is your srvice center?
*** did the officer after the Interview took your index finger and signature on white form that is for Card ??
thx,
Spartakus