The phone runs iOS 7 perfectly, but it cannot boot on its own. Every time the battery dies or you restart the device, you must connect it to a computer running special software to boot it up.
If you happened to save SHSH blobs for iOS 7 when it was still supported, you can perform a permanent, untethered downgrade using Legacy iOS Kit CoolBooter (Dual Booting):
This paper is for educational purposes. Downgrading may void any remaining warranty and violates Apple’s terms of service. Always back up data before attempting. Downgrade Iphone 5s To Ios 7
On the other hand:
When Apple allows an iOS version to be installed, it "signs" the firmware. You can install it freely via iTunes or Finder. The phone runs iOS 7 perfectly, but it
Install dependencies like libusb and irecovery via Homebrew if prompted by the script. Step 3: Enter DFU Mode
However, . If your goal is strictly a pure iOS 7 experience, Method 1 or utilizing preserved SHSH blobs from 2013 are your only viable paths. Critical Risks and Limitations to Keep in Mind Downgrading may void any remaining warranty and violates
| Feature | Stock iOS 12.5.7 | Tethered iOS 7 | Untethered iOS 7 | |---------|------------------|----------------|------------------| | Boot without PC | Yes | No | Impossible | | Cellular | Yes | Sometimes | No | | Touch ID / Passcode | Yes | No | No | | App support | Limited (2026) | Almost none | None | | Stability | High | Low | N/A | | Feasibility | 100% | 5% (expert only) | 0% |
Because of this exploit, the rules change slightly compared to newer devices. If, and only if, you were proactive enough to save your "SHSH Blobs" for iOS 7 back when it was still being signed, you might be able to downgrade. Tools like (and legacy tools like odysseus or tihmstar's utilities) are designed to stitch these saved blobs into a custom "Signed IPSW."