Firmware keys for ios 9.3 iPhone4,1 Have been released
Custom Firmware 9.3 is possible iOS 9.3 – iPhone 4S Still Signed
also you can mix the two iso 9.3 and 9.3.1 for iphone 4S CFW
Using mixed method from 9.3 and 9.3.1 for iphone 4S
This firmware keys will let you how to combine iOS 9.3 File System with iOS 9.3.1 IPSW in order to create a custom firmware (IPSW) and restore with LibiMobileDevice for iCloud Bypass on iPhone 4S iOS 9.3.1
It might work with your iphone 4s using libimobilerestore but custom firmware are very difficult to restore without iboot exploit.
I did try many custom ipsw or custom firmwares restore injection using libimobilerestore but i never managed to successfully 100% to bypass activation using CFW up to 7.1.2 iphone4. Custom Firware will work 100% on iphone 4 and other older devices using firmware keys or bundles.
- if you want be a developer you should try yours CFW and find new methods or new ways to finaly make CFW work for all.
Firmware keys for ios 9.3 iPhone4,1 Eagle_13E237_(iPhone4,1)
Firmware keys for ios 9.3 iPhone4,1 Eagle_13E233_(iPhone4,1)
How to use CFW combine ios 9.2.1 into 9.3.1 to Bypass iCloud on iPhone 5 with LibiMobileDevice