3uTools relies on Apple’s core drivers to communicate with Apple’s servers. Outdated or missing drivers often cause "Unable to Request SHSH" errors even when the firmware is signed.
Before doing anything else, verify whether Apple is still signing the iOS version you want.
If you are trying to install a currently signed firmware (or have valid blobs) but still get the "Unable to request SHSH" error, the issue is usually your computer's network connection or Hosts file. i unable to request shsh 3utools fix install
A device stuck in a normal boot state can sometimes fail to request blobs properly.
If you have tried all fixes and the firmware is unsigned, you have two realistic options: 3uTools relies on Apple’s core drivers to communicate
Ensure your computer has a stable internet connection. If you are on a restrictive network (like a school or office Wi-Fi), try switching to a mobile hotspot or a home network.
The solid answer for why you can’t request SHSH and how to fix it: If you are trying to install a currently
Problem:
Apple stopped signing the iOS version you’re trying to install.
Solution:
| Step | Action |
|------|--------|
| 1 | Check signing status at ipsw.me |
| 2 | If unsigned, you must have saved SHSH2 blobs |
| 3 | Use tsschecker manually (cli) to request blobs: |
tsschecker -d iPhone10,1 -e 0xYOURECID -i 15.1 -s
| 4 | In 3uTools: Tools → SHSH → Show saved blobs → Use local | | 5 | If no blobs → can’t fix → you can only install signed iOS |