I have an iPhone 4 on 4.3.4. It had a tethered jailbreak using redsn0w. I had some wifi problems so I selected the option to "reset all network settings" or something like that. Now my iPhone won't go past the apple logo. Getting it into DFU mode has not worked. I know how to get into DFU mode, and that is not the problem. I turn the phone off, hold the home and power button, but 5 seconds into that, the phone turns off. It does not allow me to hold it for 10 seconds. Is there ANY way for me to restore my phone to factory, or any way at all for me to connect and be identified by iTunes without fully powering on ?