If not, download the iOS 6.0 firmware file for your device. Step 3: Download RedSn0w 0.9.15b3. Step 4: Connect your iOS device to the computer and place into DFU mode.

Step 1 - Download Android 4.2.2 CF-Auto-Root Package for Galaxy S4 I9505 on your computer and extract the zip file. Step 2 - Download ODIN v1.85 which is needed to root the official firmware on ...

To update the Galaxy S4 to Android 4.4.2 KitKat -- version I9500XXUFNB3, users can download and install the firmware over-the-air by going to Settings > More > About Device > Software update.

Check this tutorial to install Android 4.1 on Sony Xperia X10 via CM10 firmware.