Is it necessary to upgrade ios8 and what do I need to pay attention to before upgrading iOS8?

One of the upgrade methods is equivalent to flashing, which will erase the data in the device. Before upgrading, make a backup.

Three iTunes make sure it is the latest version and run iTunes IV to put the device into DFU mode (black screen state):

1) Connect your device to your computer;

2) Turn off the device.

3) Press and hold the home button and the power button at the same time for 10 seconds (to time accurately) 4) Release the power button and continue to press and hold the home button until you see the prompt "iTunes has detected an iPhone in recovery mode" on the computer, click OK, and the phone is in a black screen state. If it still says "Connect iTunes with a cable", repeat the four steps above and try again.

The space required for this iOS 8 upgrade is: That is to say, if you want to upgrade with OTA, that is, directly through the wireless update with your phone, you may run out of space. Many people have deleted**delete** for this.

If you buy a 16G iPhone, this is almost an unavoidable problem. Before you decide to make room for iOS 8 upgrades, you can also consider using a computer to upgrade. It doesn't require space on your iPhone, and upgrades will be more stable.

All you need to do is connect your phone and tap View Updates. However, before that, it is recommended to make a backup of all your data. This ios8 upgrade process was relatively smooth, and the whole process only took 40 minutes.

The situation is also much better than when ios7 was upgraded. Regarding data backup, it is recommended that you still back up your data locally. Because if you have a lot of apps, it will be a very painful thing to restore through iCloud under the current network conditions.

For the upgrade method, it is not recommended to use the OTA method to upgrade. I once planted a heel on the OTA, and several times the phone was hung up, resulting in the loss of all data. Always remember to back up your data before upgrading.

Of course, if you have enough space on your iPhone, and you have enough information about your character. You can find the upgrade entry in the iPhone's Settings - > General - > Software Upgrade. When I first bought the iPhone5, I took into account that I had too many applications and chose 32G.

As iOS 8 and iPhone 6 get more and more powerful, there will only be more and more apps and **. In order to upgrade smoothly next time, if conditions permit, everyone buys iPhone6 or 64G.

When upgrading iOS 7 last year, many people were worried about whether their old machines could bring the new version of the system. However, in the end, it was found that upgrading from iOS 6 to iOS 7 was not a major problem, and the system performance did not show a significant decrease. But this year's iOS 8 is a different story.

After the release of iOS 8, there were foreign ** tests for the times. There were a number of problems, such as: some new features were not available, the system font did not match the display, the system slowed down significantly, the system's keyboard was sluggish, the screen rotated and the interface was not flexible.

Should I upgrade?

When upgrading iOS 7 last year, many people were worried about whether their old machines could bring the new version of the system. The final results showed that upgrading from iOS 6 to iOS 7 was not a major problem, and the system performance did not show a significant decrease. But this year's iOS 8 is a different story.

Judging from the problems that will be encountered after the upgrade, users may not be "fashionable" this time.

However, if you do not upgrade to the latest version of the system, your device may be exposed to certain security risks. At the same time, iOS 8 may make more optimizations to these older machines in subsequent upgrades, so refusing to upgrade may not be the best option in the long run. If you still want to try to upgrade your device to iOS 8 but are worried about the problems after the upgrade, you can choose to roll back the system to iOS 7, but the iOS 8 system may be turned off at the moment, and the downgrade will become extremely difficult.