The -75 error is typically a communication breakdown between your computer and the iOS device, often triggered by hardware interruptions, driver issues, or faulty USB connections. Here is a step-by-step guide to troubleshooting and fixing the link. 1. Check Your USB Connection (The Most Common Culprit)
Ensure that 3uTools has permission to pass through your Windows Firewall. 4. Use DFU Mode Instead of Recovery Mode 3utools error unable to restore idevice75 link
DFU mode is a deeper state than Recovery Mode; it doesn't load the device OS, which bypasses many software-level "handshake" errors. The -75 error is typically a communication breakdown