I am trying to unlock my iphone;. But whenever I try to restore i don t get the yellow triangle?

I opened mine using this video. the video u said to use anySIM. REMEMBER, restart the iPhone after anySIM is done and put the SIM card of your choice, even if you get an error. I made a mistake and does not restart after I received an error. http://www.youtube.com/watch?v=SYY0K059ZXQ