So I followed this video on youtube, and I have the 5.1 ipsw and redsnow 0.9.10b6. Now, in the video it says that my iPhone needs to say NO SIM, but my iPhone says No Service. I have a few questions, is it okay for me to use this outdated version of redsn0w and 5.1 ipsw for my 5.1.1 iPhone? and is it okay to proceed even though my iPhone says no service? THANKS!