: This is arguably the most popular custom IPSW use case. It allows the 4s to run a much faster, skeuomorphic version of iOS compared to the often sluggish (the final official version). KDFU Mode Integration
: Experimental custom IPSWs can sometimes unlock internal Apple testing tools and settings not found in public builds, though these are largely for collectors and developers. Key Creation and Restore Tools How to Downgrade an iPhone 4S to iOS 6.1.3 in 2024! iphone 4s custom ipsw
You have two options: download a pre-made custom IPSW (risky for security) or create your own (recommended). : This is arguably the most popular custom IPSW use case
Several legacy communities host verified IPSW files. Proceed with caution: Key Creation and Restore Tools How to Downgrade
, custom IPSW (iPhone Software) files are most commonly used for jailbreaking downgrading
the device's operating system to improve performance or access legacy features. Popular Features of Custom IPSWs
| iOS version | Custom IPSW boot type | |-------------|----------------------| | 5.x – 6.1.3 | Tethered (except if using alloc8 + blob) | | 7.x – 9.3.6 | Tethered only | | 6.1.3 (OTA method) | Semi-tethered (can boot with a computer) |