Cập nhật ios 9 cho iphone 4


If you want to update your iPhone 4/4s to iOS 9, this article will help you with that. Here shows you how to update iPhone 4/4s to iOS 9 and things you need to pay attention to.

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2. Check Compatibility Of Your Device

Another thing you need to know when you are dealing with how to update iPhone 4/4s to iOS 9 hassle-free is the compatibility of your iOS device. iOS 9 is currently available for iPhone 4s and models, which came afterward. You can also upgrade it for iPad Air 2 and iPad mini 2 and 3 efficiently.

So, if you have an Apple device that operating system. iOS 9 requires storage is not compatible, you should stop then and there from making an upgrade as it may harm your device. Plus, you should check and then upgrade your iOS device to the new iOS version to avoid problems later on.

3. Sufficient Space To Install Update

When you download and install the new firmware on your device, you are notified of the need for free space. Ample of space may be required to install the upgraded version of the operating system. iOS 9 requires a storage space of about 1.3 GB on your iPhone. Free up some disk space on your iPhone by either deleting your media files or by storing them at another location. You can restore the data back to post the up-gradation process.

4. Update Apps before iOS 9 Update

Update apps and games to the latest version before upgrading iOS 9 as you might not be able to open, delete or update the apps after the iOS upgrade. It may also cause apps crashing and freezing. Hence, it is recommended to know how to update iPhone 4/4s to iOS 9 prior to rolling out the process.

Keeping in mind the above mentioned necessary tips, you can easily update iPhone 4s to iOS 9 without troubling yourself in future.

Part 2: 2 Ways to Update iPhone 4/4S to iOS 9

Of course, you can also try the WhatsApp built-in email feature to export WhatsApp messages. This is an appropriate solution if there are not so many WhatsApp messages that need to be exported. Now let"s take a look at some tips on how to operate this for both iPhone and Android.

1. Update Over The Air (OTA)

The wireless delivery of new software or data to mobile phones and tablets is known as over the air update. If you want to upgrade the underlying operating system, OTA updates are just meant for you. As the name suggests, you get your updates from wireless carriers, not via USB or other connectivity methods.

Over the air technology is basically used to administer Software Updates, configuration settings, etc directly to your portable devices like Smartphones and tablets. For an over the air (OTA) updates, you should follow these steps.

Step 1 . Head straight to the "Settings" of your iOS device first.

Step 2 . Next, scroll the settings menu down and get into the "General" section.

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Step 3 . Lastly, push the "Software Update" tab and then the device will automatically check for the latest firmware update available for your iOS device.


2. Update iPhone via iTunes

When you think about how to update iPhone 4/4s to iOS 9 safely, then the first thing that comes in your mind would be iTunes. The default iOS data management software is designed in a very simple way, making it easier to navigate between sections. You need to follow these steps to update iPhone 4s to iOS 9 easily.

Step 1 . Make sure that you have the latest version of iTunes installed on both your computer and your iPhone.

Step 2 . Now, plug in your iOS device into your computer with the help of a lightning cable supplied with it.

Step 3 . Next, launch the iTunes on your computer and it will detect your iPhone automatically. Now, select your iOS device. And get into the "Summary" section.

Step 4 . Hit on the "Check for Updates" button and iTunes will look for the latest firmware update for your iOS device.


Step 5 . Lastly, it will throw a pop up on your screen if the latest firmware is available for your iOS device. Hit on the "Download and Update" button to initiate the update process.



Now, after reading this article, you won"t need to worry about how to update your iPhone4/4S. If you are willing to undo an iPhone update, here is the guide to help you with that. Actually, those methods work for all versions of the iPhone, you can also backup your iPhoneX by using dr.fone in one click.

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