Once you are plugged in and connected via Wi-Fi, open the Settings app and tap on General Tap Download to download the update.
Go back to Settings Software Update and then tap Install Now to install the now downloaded i OS update file.
If you’re not getting the OTA, then you can download the i OS 8.1 software update from the official download links provided below and use i Tunes to update your i OS device. take a moment to make sure you are using the latest version of i Tunes.
Click on i Tunes in the menu bar and then click on “Check for updates.” Once i Tunes is all squared away, it’s time to turn your attention to your i OS device and follow these instructions: Step 1: Connect your i OS device to your computer using an USB cable.
Your i Phone may be locked, if so it'll show ' Invalid SIM' or ' SOS only' in the top-left corner of the screen.
You can unlock it with a backup and restore, read on for instructions.
Apple has just released i OS 8.1 for i Phone, i Pad and i Pod touch, which includes a number of improvements and new features such as SMS Relay, enables Apple’s NFC based Apply Pay mobile payment service, i Cloud Photo Library in beta, and restores the Camera roll.
It is always a good idea to take a backup of your i Phone, i Pad and i Pod Touch before updating it with the latest i OS software update.
(Note that if you choose to encrypt your backup using i Tunes, along with normal data, secure information like passwords etc.
are also backed up.) Before you start the download, plug in your device so the battery doesn’t drain during the update process.