Based on the version number "v1.1," you are likely referring to iPwnder for Windows , a free utility developed by Gautam Great used to put iOS devices into "pwned DFU" mode. The primary feature included in iPwnder-v1.1 Fixed compatibility for iPhone 6s
Disclaimer: Modifying iOS devices can void warranties, brick devices, or lead to data loss. Proceed at your own risk. The author is not responsible for any damage caused by improper use of ipwnder-v1.1. ipwnder-v1.1
For verbose output and auto-retry:
Warning: This is for advanced users. Incorrect usage may require a device restore. Based on the version number "v1