How To Update Iphone 3gs To Latest Ios

1

Back up your iOS device. ^[1]
2

Open Settings. It's a gray app with gears that's typically located on your home screen.

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3

Scroll down and tap General .
4

Tap Software Update . It's at the top of the menu.
5
Tap Download and Install or Install Now . If a software update is already downloaded, the Install Now button will appear below the update description.
- You'll need to accept legal agreements before manually downloading the update.
6
Enter your passcode if prompted. Enter the passcode you use to unlock your phone.
- Your phone will restart and the update process will begin.
- In some cases, you may have to set up your phone again, although all your apps and data should be intact.
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1
Connect your device to your computer. Use the USB cable that came with your device.
- Tap Trust on your device's screen if prompted after connecting.
2

Open iTunes. Do so if iTunes doesn't launch automatically when you connect your device.
3

Click on your device's icon in the top bar of the window. It may take a moment to appear.
4

Click on Back Up Now . Before updating, it's always advised to create a backup in case something goes wrong. This should only take a minute or two, and will allow you to restore your iOS device along with all your data if an error occurs during the update process, or if you like the old operating system better.^[2]
5
Click on Check for Update . You'll see this on the Summary page after selecting your iOS device.
- You may be prompted to update automatically when you first launch iTunes with your device connected. You'll see a notification if your device is already up to date.
6

Click on Download and Update . This will download the update to your computer, and apply it to your iOS device. This process may take a while, and you can monitor the progress of the update on your device's screen.
7
Set up your device. After the update has been installed on your iPhone, iPad, or iPod, you'll need to complete it by entering your passcode or signing in with your Apple ID.
- If you installed a major update, you may be given a brief overview of the changes.
- Remember to turn iCloud Backup on again.^[3]
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Add New Question

Question

How do I update from iOS 7.1.2 to iOS 9?

If you're using an iPhone 4, iOS 7.1.2 is the last available version of iOS. You won't be able to install a newer version of iOS. If you're using an iPhone 4S or newer, follow the instructions above to update.
Question

Can I upgrade my iPhone 3GS to iOS 7?

No, the latest available version of iOS for the iPhone 3GS is 6.1.6. It is not possible to update to later versions or run apps that require later versions of iOS.
Question

Can I update my iPhone 4?

The iPhone 4 cannot be updated past iOS 7.1.2. If you want to use a newer version of iOS, you'll need to get a newer iPhone.
Question

My device is running an older version of iOS, but the Download button is not available. What do I do?

Chances are you're using a device that is no longer compatible with newer versions of iOS. The iPhone 4 and older iPhones cannot update to the latest version of iOS. The 1st Generation iPad can also not update past 5.1.1, and iPod Touches 4th Generation and older cannot get the latest version.
Question

Can I update my phone from the internet without having mobile data service?

Yes. All that is required is an internet connection, which you can get via WiFi. Once updated, your phone may require a SIM card to be inserted before it can be activated. If this is true for you, you can insert any SIM card from your carrier that will fit in the slot, whether or not the card has been flashed with a phone number.
Question

How can I free up space to install the update?

Deleting old photos off your iPhone is the quickest way to free up a lot of space. Games that you no longer play may also be taking up a lot of storage. If you don't want to delete anything, you can use iTunes to download and install the update.
Question

Is the iPhone 4s compatible for iOS8?

You've just squeezed in — the iPhone 4S (but not the iPhone 4) can run iOS 8. Apple typically stops supporting each iPhone device after about 3 years, so you'll probably need to get a new device if you want to keep updating the iOS.
Question

I have a jailbroken iPhone, should I update it?

Installing an update will remove your jailbreak access, and will likely prevent you from re-jailbreaking it until the newest exploit is found. if you want to keep your jailbreak, you'll want to avoid updating.
Question

Why won't an iPhone 3G update to the latest IOS?

Unfortunately, the hardware on the iPhone 3G is too old. Apple usually discontinues a product after 3 years.
Question

How do I update my iPad 1?

The hardware of the iPad 1 is too old to get updates. The latest iOS version you are able to install on it is iOS 5.1.1.