Custom firmware update fail (PwnageTool until 4.0.1). You have to restore the device with a custom firmware. Update to a custom firmware isn't working. Device isn't bootable. 2. USB Problem. Check the USB connection and try other direct ports or maybe the USB cable is an older one. Device isn't bootable.
May 29, 2018 · Apple's latest software for mobile is out and here's how you can download iOS 11.4 IPSW file, over the air (OTA) or just do a clean install if you like on your iPhone, iPad or iPod.
For Windows users, after connecting your iOS device to iTunes and launching iTunes, hold down the Shift key and click "Restore" to force iTunes to restore custom IPSW file. This displays the IPSW browse menu to let you select IPSW file for restoring. After that iTunes will restore your device to the firmware you desire.
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