Hi, when my son arrived, I did not pay for the green card fee of $165 instead I applied for the passport right away and he got issued a US passport. But the USCIS sent us 2 notices asking for the green card payment. So to avoid future hassles, I paid it and after few weeks we got the greencard by mail. On December 2016, before the fees went up from $600 to almost double, I applied for N600 just to have a peace of mind. It has been 3 months since and we only got the NOA that they have received it. It is said that it takes 6 months to process. My son wants to go home to visit but I said he got to wait because he might be called soon for the oath. I hope this helps and let me know if you have any more questions. Have a great day.
