1. Install &start 3uTools.
2. Connect your device to the computer via the USB Cable.
3. 3uTools can immediately show you which firmware versions are compatible to your device; furthermore, you can click the button “download” to get the iOS firmware file you want.
*“Easy Flash” of 3uTools can help you restore your device to the particular iOS firmware with one click. And it supports iOS 4.0-9.2.1 flashing with better user experience and faster speed.
*In addition, currently 3uTools can jailbreak iOS9-9.0.2, iOS8-8.4, iOS7-7.1.2, iOS6-6.15, iOS5-5.11 and iOS4-4.3.5 untethered.
- 3utools gsmforum