How to restore iPhone/iPad without iTunes? This video shows you use third party ipsw restore tool to restore iPhone 7/7 plus/6/5s/5 step by step. https://www.tenorshare.com/products/reiboot.html
Here is the guide:
1. Download ReiBoot.
2. Connect iPhone/iPad to PC via USB cable.
3. Choose “Fix All iOS Stuck”, in the next window, select “Fix Now”.
4. You can click “Copy” button to download Firmware via browser and download it directly. Or click Select to choose one from your local computer.
5. Adding iPSW file.
6. Start restore. The process will take about 5 minutes.
7. Restore success.
My website: https://www.tenorshare.com/products/reiboot.html .