don't worry too much. Phoenix lockbox is very slow. My package was delivered on 09/04, got email and sms notice 2 weeks later and i797 arrived yesterday. I was worried at the beginning too. Then I did some search and figured out that some of the cases in september last year took more than a month for the I797 to arrive. I was released then.
g*b
4 楼
Thanks, I got the E-notification this morning. Said,"We received your application on Sep 20,and the case number."