The dimensions of all iPhones are in centimeters. Size comparison.

iOS 9 Software Features

Update 9.2 is available for download on iPhone 4 with improvements and bug fixes. It has been significantly redesigned, modernized and equipped with many new features. Significant improvements have been made to the Apple Music, iBooks and iOS Mail applications, as well as several others.

What do you need to know about the system before installing iOS 9 on iPhone 4?

iOS 9 is undoubtedly a great software. However, as with any operating system, the more it is updated to accommodate new devices, the more sophisticated its technology becomes, and iOS 9 is no exception. In addition to the standard iPhone features (cellular data and Wi-Fi, multi-touch screen, App Store support, GPS, Bluetooth, etc.), the 9th model received:

Maps with support for interactive multi-variant routes and route determination.
The "Wallet" program for viewing transactions with bank cards.
Apple Pay sales terminal promotion application.
Full screen video playback.
Activity with the new Workout feature with monthly workout data tables.
iCloud Storage with the addition of an active application status dashboard.
Performing two-level authentication of iCloud user records before installing iOS 9 on iPhone 4, which significantly increases the security of the device as a whole.

Detailing of small objects

The most unexpected option in comparison. At first glance, the color, brightness and detail look unusually similar. Especially when I remember the gap in time and technology between smartphones.

Then, of course, the overexposure and lack of clarity in the texture of the seeds and leaves are noticeable.

Yes, the glass on the four is cloudy, there is overexposure and there are fewer microtextures on the leaves. Moreover, all points can be corrected before and after shooting. At such moments, the thought “where is the progress?” flies for a second.

Indoor color rendering

Most likely, you have already noticed that the iPhone 4 has difficulty with white balance - instead of blue or yellow, it, like most older cameras, goes purple-green. At the same time, it’s difficult to say what’s going wrong. If you don’t see pictures of the iPhone 11, it’s difficult to find obvious problems, because in general the picture doesn’t lead into outright “China for 5 thousand.”

In the example above, reality was in the middle. It was a cloudy day, so the sun gave off just a little bit of an orange tint, which the iPhone 11 turned up dramatically.

The four produced a bland, but neutral version close to reality, into which they mixed green. Take a closer look at the dome in the center: the shadow inside it is all stained. This processor was trying to mix those same opposite green and purple to produce gray. It turned out tolerable, especially for a ten-year-old matrix.

Indoor brightness range

It's amazing how well the iPhone 4 captured the lighting levels of a building. Moreover, it better reflected reality. But there is a lot of glare from the lamps, and the whole picture turned out darker.

iPhone 11 pulled out the color of the walls, making them futuristic white, and increased the contrast from artificial lighting.

In fact, this was not the case, because the building was in twilight. From experience, the latest generations of iPhones are distinguished by the fact that in photos they draw out a darker reality.

This is why, by the way, the volume is felt better: advanced photosensitivity together with smart processing by the A13 processor allows you to more effectively adjust different parts of the image.

Pros and cons of changing versions

Before you update your iPhone 4 to iOS 9, it is important to know the pros and cons of this process. This will help the user decide whether he wants to upgrade iPhone 4 to iOS 9 or not. After which he will be able to get a whole range of applications that were not available in older versions.

Positive points:

It optimizes the smartphone by providing user-friendly features with smaller upgrade sizes.
iOS 9 has many new features that will speed up your smartphone.
The updated keyboard is one of the best features that saves time while typing.
The iPad's split screen feature allows the user to multitask like a pro.
Lots of high quality and advanced features provided by iOS 9.
A new dual-column notification center for the iPad Mini and Low Power Mode for the iPhone 4s are some of the major additions.

On top of this, iOS 9 does present noticeable performance results with improved app response times, improved battery life, and iOS 9's ease of customization.

Disadvantages of the update:

The visual design of iOS 9 is very similar to that of its predecessor.
If you are updating an older iOS device, such as iPhone 4 to 9, then it may slow down your phone.
If the user has a jailbroken device, they will lose all privileges.
If the user is not satisfied with the performance of the device after the update, he will have to carry out a new update and downgrade the system version.
The vast majority of new features are not compatible with older hardware.

After weighing these pros and cons, the buyer will be able to decide whether he needs the Apple iOS 9 update or not.

Device failure with new OS

Sometimes when a user tries to install iOS apps on managed devices, they are denied.

Possible reasons:

In case of devices with iOS 4.0. The App Store must be present on the device to install applications, either manually or via MDM.
For devices running iOS 9.0 or later, you can install apps without requiring the App Store.
Make sure that the application store is limited by MDM. If yes, enable it by going to “Application” - “Users” restrictions.
Ensures that the user has not disabled the Store app due to device restrictions.
You can view these restrictions by going to Settings - General - Restrictions.
Make sure the user has an App Store account added.
Users may not be able to add their account to the App Store if changing account settings is enabled, it is present in the Restrictions - Enhanced Security section.
Disable these restrictions so that you can add your account to the App Store.
You can install apps on devices running iOS 9.0 or later, regardless of whether users are signed in to their App Store account or not.
Click the “Cancel” button when starting the installation of the application.
If a user repeatedly enters incorrect iTunes credentials, or if the device is unable to access apple.com, which is required to initiate app installation, you can prevent this error by installing apps that do not require an App Store account.
If the application is already installed on the device, remove the application manually. You need to remember that once an application has been removed from the App Store by the developer, it cannot be used on the device.

Details and volume

If you didn't immediately notice the fly in the left photo, don't be surprised. This is exactly how (un)clearly the iPhone 4 shot up close.

On the right, not only the insect is noticeable, but also the depth of the frame. The grass in the background has a beautiful blur thanks to the wider ƒ/1.8 aperture, and the stamens do not merge with the petals. The petals are also visible much better thanks to Deep Fusion.

conclusions

Overall, the iPhone 4 is truly a breakthrough. There are fewer disadvantages in it, more advantages. The only thing that upsets us is the price, which is much higher than abroad. But if you are accustomed to the previous version and cannot imagine life without this gadget, then you should pay close attention to the new model - it is worth it.

Advantages

Improved Design
High speed
A large number of programs
Multitasking
Improved sound quality
Possibility of video calls
Good wifi work

Flaws

Not very comfortable headset included
Many users complain about the inability to download files in the usual format
Incorrect operation of the light sensor was noticed
Price

Overall verdict

9.5

Alternative

HTC Desire HD

Common problems after changing firmware

It has been noticed that after updating iPhone to iOS 9, many users are facing unexpected problems after which iOS 9 becomes slow. For example, you may receive a software update error message, or your device may simply be stuck in a reboot loop with only the iTunes or Apple logo showing on a black screen. To get rid of these problems, you need to enter DFU mode, but first make sure that you have downloaded the latest version of iTunes and back up your device in advance.

If you notice a decrease in iPhone speed since the update, you need to:

Reduce the animation by going to settings and clicking "General" and "Accessibility". After that, click “Collapse Animation” and activate the option.
You can also perform a hard reset by holding down the Home and Power buttons until the Apple logo appears.
Back up your device via iTunes or iCloud, and then reboot your device to factory settings.
If a user was not careful before updating to iOS 9, they may lose their data if they make mistakes during the update. Software like PhoneRescue will allow him to recover files that he accidentally deleted or lost.

Passing through the lock screen

There are several working methods that will help the user easily activate iOS 9:

Update your device. Since this issue is limited to iOS 9, the issue will be fixed.
Updating to the latest version of iOS 7 will solve all activation problems in a jiffy.
Hacktination. If a user is adamant about staying on the current version, they can jailbreak their iPhone. However, the hacking process is impossible without access to SSH, since it includes a lot of advanced materials that are inaccessible to an inexperienced user.

IPhone 4 was released back in 2011. New phones are much faster, have larger screens, can store much more data and have better cameras. Saving money is the only reason to continue using the iPhone 4. It's better to consider buying a new iPhone. The user will get a new, fast new phone with all the latest hardware features and the latest version of iOS. However, any model that a buyer decides to upgrade to iPhone 9 will be significantly better, so whether to install iOS 9 is up to the user.