I have tried to reinstall the ios7 beta2 several times to no avail. I can't restore because find my ipad is on. It wont let me downgrade to iOS6. I got into the activation screen, and set it up, but now I cant get past the apple logo. It just shows the apple logo over and over. Will not start up. What do I do!!??? I am a developer, and the device is registered. Its an iPad4. non cellular. Thanks!