I thought I give enough time to get N-400 approval, but I didn't. So I have to spend $450 to renew my green card on 1/26/2015, my 10 year green card expires on 6/2015.
I called the 1-800 number 3 times.
send 4 emails to USCIS local office (Pittsburgh).
made one infopass appointment on 3/12/2015.
But nothing happens, still waiting, maybe for name check?