Five things that iphone6 must pay attention to when upgrading ios9: In order to upgrade smoothly, users should make preparations in the following five aspects in advance: 1. Empty the cell phone space and delete unnecessary content. This year, Apple said that it had solved a problem reported by users in previous years, that is, there was not enough space to upgrade the new system. The file size of iOS9 this time is about 1.5GB, which is much smaller than the previous upgrade. However, it is best to delete old applications, photos and videos that are no longer needed before upgrading. To view the remaining space, you can set? General-Usage (Settings > General & gt Usage). 2. Check the equipment compatibility. IPhone 4 or the first generation iPad does not support iOS 9. Almost all iPhone and iPad can be upgraded to iOS 9. And Apple also said that iOS 9 can improve the performance of old devices. However, if you are an iPhone 4 or iPad user, unfortunately, you need to buy a new device to upgrade iOS 9. 3. Before upgrading iOS 9, you need to upgrade the device system to the latest version. Although it sounds strange, you still need to upgrade your device system to the latest before upgrading iOS 9. By setting? Software update (Settings >; SoftwareUpdate) to view the system version. 4. Errors may occur during the upgrade. Please back up the files in advance. Although the probability is small, there may be problems when upgrading the new system. Just in case, click? Upgrade? Before pressing the button, you need to back up your mobile phone files to your computer or cloud. Although your device may be automatically backed up when charging every night, for the sake of safety, it is recommended that you do the following: Settings? ICloud, and then click? Backup? . Of course, you can also back up files to your computer. Be patient and wait a few days if necessary. It's good to try early, but the new system may have various problems. Although you can upgrade to OS 9 soon, if you are patient, you can wait a few days before upgrading. Last year, early users encountered various problems, such as WiFi and call problems. If you don't want to be? A mouse? , you can continue to use iOS 8 for the time being. At the same time, pay more attention to the circle of friends and see if there are any users complaining that the next step is the focus of the upgrade: ios9 upgrade device list: Before upgrading, the first thing you need to determine is whether your terminal is on the official version update list of iOS 9. Apple's previously announced products include: iPhone 6 Plus, iPhone 6, iPhone 5S, iPhone 5C, iPhone 5, iPhone 4S, iPad Air 2, iPad Air, iPad mini 3, iPad mini 2, iPad mini, iPad 4, iPad 3, iPad 2 and iPod touch 5. Iphone6 upgrade ios9 upgrade method: the upgrade process of iOS 9 includes two ways, one is OTA directly on the terminal, that is, Settings-General-System Update, and the other is iTunes upgrade on the computer. It should be noted that the server will be very busy a few days before the official version of iOS 9 update is pushed, so there may be some problems during the upgrade process. If it's not urgent, it's not too late to update after the system is more stable. Iphone6 upgrade ios9 upgrade tutorial: OTA update is not mentioned, and the method is relatively simple, that is, setting-general-system update; Now let's talk about upgrading with computers. Before updating, you need to back it up through iCloud or iTunes. The backup process of iCloud is in the settings. Just find iCloud and click the backup option. In iTunes backup, you can synchronize with iTunes WiFi (Settings-General -iTunes WiFi Synchronization), or you can connect a computer and make backup according to the pop-up prompts. After the backup, it is easy to talk about the upgrade on the iTunes computer. Before starting the upgrade, you should manually download the official version firmware of iOS 9 corresponding to your terminal. The specific methods are: 1, connect the device to the latest version of iTunes with a data cable, and then open iTunes. 2. Hold down the Shift key on the keyboard and click iTunes at the same time. Update? Function; 3. According to the dialogue window popped up in iTunes, select the corresponding version of iOS 9 firmware and click Update. After talking about the upgrade method, there is a lengthy digression at last. After reading the introduction, everyone is deciding whether to upgrade or not. Smarter Siri In the official version of iOS 9, Siri becoming smarter is the most obvious change. Siri, defined as a personal assistant, can learn to understand you and predict what you want according to your usual habit, place and time of using equipment. In short, you will like Siri's intelligence and gain surprises during use. Of course, in order to meet your expectations, Siri did it? Micro plastic surgery? . First of all, Siri's user interface has changed, and it has become somewhat like the interface of Apple Watch. When listening to you, there is an undulating line at the bottom of the screen. In terms of sound, Siri has six different choices, namely gender and Anglo-American-Australian combination. Green tea network recommends the combination of female voice and British English, which will make Siri more sexy and intelligent. Among the many intelligent improvements of Siri, one of the most useful places is the use of voice search photos. When you have a lot of photos, this function of Siri becomes particularly important. As long as you say the time or place of the photo in front, you can find the corresponding picture and reduce the trouble of finding it. What makes us think Siri is more intimate is ecstasy? Hey, Siri? This sweet greeting can even wake up our standby mobile phones. Siri can also report the results of games you care about to you. Of course, you need to ask it. Mark a restaurant on the map and let Siri set a reminder. Remind me of this restaurant when I get home? . It will do as you say. New search interface When you upgrade iOS 9, you will see a new search interface. This interface not only has a search bar, but also your common contacts and applications set in advance, which will help you reduce the search time. In addition, some recommend some apps and information according to your address. Of course, when you are in a strange environment, these recommendations will help. However, it should be reminded that these suggestions are not all reliable. After all, after localization, some things are not as experienced as crooked nuts. There is no praise for crooked nuts here. It's easier to find pictures. In addition to Siri's intelligence, the upgraded version of iOS 9 is very intimate and solves people's growing demand for finding pictures. Especially for girls who take selfies, it is a huge project to find the most beautiful one among thousands of selfies. But in the new version, all your pictures have become thumbnails, neatly arranged at the bottom of the screen, which is so efficient that the cliff will save you a lot of pain in the process of finding pictures. Multitasking on iPad Many iPad users have been looking forward to multitasking. After all, the screen is so big that you can do many things at the same time. Now, the upgraded version of iOS 9 can meet this requirement, so that iPad users can open two applications at the same time and scream ~ ~ Simply put, the new system will realize that the two programs will run in three ways, namely: sliding out, splitting the view and picture-in-picture. Sliding out means that when you slide the screen, a small program, such as calendar and map, will appear on the right side of the screen. Split view (above) allows you to display the interfaces of two applications on one screen at the same time. You can also move the middle dividing line, adjust the display size of two applications, and even cover the video screen to other applications. Picture in picture is easier to understand. When running one program, you can open another program and adjust the picture to get the effect of picture in picture. The cooler news APP will not talk nonsense. Image above: This is a news application on the iPhone. For You in the picture above is a customized news column. All the content here is based on your subscription and your favorite news types. This is the news application interface of the larger screen on the iPad. Is typesetting cool? Click on a piece of news, and the layout you see is simply the layout of a high-end magazine! ! Texture, fashion, wood? !