I've got two older iPhone 3Gs that I'd like to make usable for my kids around the house as wifi imessage devices. I plugged them in and it prompted me to upgrade them, which I did. Now the phones are stuck on the "plug into itunes" mode and iTunes shows an "iPhone" when connected, but the window to the right that should show the setup information just is blank with the word "iPhone" in the middle. I've tried putting it into recovery mode and restoring it twice more since then, but the same thing keeps happening and I can't get to where I can just use it without the phone enabled. I had no problems doing this with an older 3GS I'm not using. When I tried to manually select a firmware version for restore, I get messages that the firmware is not compatible with whatever IPSW file I try to use for the 3G. Any ideas on how to get this working?