my phones stuck on that screen and ive tried downgrading and upgrading, restoring on itunes, and even tried the zIphone hack/unlocking method and it is still where it was from step 1. please if anyone can help me with this =[

Same here for me!

I think my problem was to press "Restore" in AptBackup instead of "Backup". So my iPhone always showed the slider to power off. I then wanted to restore it, but then I came into a reboot loop. From there, I can not enter the DFUE mode to install any other custom or older firmware. I alwayws end in the restore mode.

What is working is to install a original firmware, but this ends in a locked iPhone, impossible to unlock as there is no way to enter DFUE mode to jailbreak or unlock it.

Does anyone know this problem or can help me with this?!