Submitted by Admin on January 12, 2018, 9:29 am PST 566
Specifications and info
A1303 and A1325
32bit - Samsung S5PC100
600Mhz Single-Core ARM Cortex-A8
Official signed firmwares update.
1. Connect your iPhone or iOS device to your computer.
2. Select the device in iTunes online or downloaded version of iTunes.
3. On a Mac, hold down the “Option” key and then click on “Update”.
4. On a Windows PC, hold down “SHIFT” key and then click on “Update”.
5. Select the IPSW file you downloaded and click “Choose”.
6. Let the iOS device update as usual.
Not official unsigned firmwares with Jailbreak and so on.. Use 3uTools and special firmwares for the tools. That's the only way to downgrade it.