Ipone6P September 20th, 200818th suggested upgrading to IOS9?

1. When can I upgrade to iOS9 GM and the official system?

Judging from the update rhythm of Apple's iOS system in previous years, the GM version of iOS9 (the gold owner) should be pushed to users of iOS9 developer preview versions Beta5 and Beta3 after the conference, and the final official version will not be released until the official launch of iPhone6s/iPhone6s Plus. According to past experience, there is almost no difference between the GM version and the final official version, but there may be differences in receiving updates in subsequent versions.

That is to say, if there are no accidents, the iOS9 GM version will officially arrive after the Apple conference in the early morning of September 10, and the final official version should wait until September 18.

2. Which devices and models can be upgraded to iOS9?

Apple has given the answer to this question at this year's WWDC20 15, including iPhone4s and iPad2, and all subsequent iPad and iPhone products can be upgraded to iOS9. In addition, this list also includes iPod touch 5 and iPod touch 6.

3. How many versions of Apple's iOS9 have been released so far? What's the difference between public beta and developer preview?

In order to help more users participate in improving iOS9, Apple launched a public beta program for this year's iOS9 and OS X El Capitan. As long as you have an Apple ID account and accept the Apple Beta software program agreement, you can download and install the corresponding description files to update your experience with iOS9.

IOS9 was officially unveiled at the WWDC20 15 Apple Global Developers Conference on June 9 this year, and the first developer preview version was released soon, and the first public beta version officially arrived one month later. There is no essential difference between the two except that the push order is different and the version number is the same.

▼ Each version is updated as follows:

Developer preview:

Developer preview beta1:2065438+June 9, 2005;

Developer preview beta 2: 2065438+June 25th, 2005;

Developer Preview Beta 3: 2065438+July 9, 2005;

Developer preview beta 4: 2065438+July 22, 2005;

Developer preview beta 5: 2065438+August 7, 2005.

Public beta:

beta 1:20 15 July 10；

Beta 2: 2065438+July 23rd, 2005;

Beta 3: 2065438+August 7, 2005.

If you want to participate in the public beta of iOS9 or convert the developer preview version into the public beta version, you need to refer to the article "Four Steps: Teach you how to upgrade and experience the public beta version of Apple iOS9" to apply for installing the corresponding description file, and then check it again in "Settings-General-Software Update" to get the update after restarting, and there will be a "feedback assistant" application icon on the desktop.

4. How to update and upgrade to the iOS9 GM version or the official version of the system?

1. For users who are currently using iOS8.3, iOS8.4, iOS8.4. 1 or older versions of the system, they can first register, download and install the corresponding description files according to the method provided in the previous section, and then restart their phones according to the prompts to check the updates again.

2. For users who are already using the iOS9 developer preview version and the public beta version, after the iOS9 GM version is pushed, just check the update directly in the settings;

3. All users can connect to iTunes on a PC or Mac, then download the iOS9 GM/ official firmware package corresponding to your model, and use "Shift”+update" or "restore" to select the corresponding ipsw firmware package.

4. It should be noted by jailbreak users that iOS9 GM and the official version have fixed the previous 8.3 and 8.4 jailbreak vulnerabilities and added rootless functions, which will greatly improve the difficulty of jailbreak. Upgrading to iOS9 means giving up jailbreaking temporarily, and plug-ins and jailbreaking applications will not be available. If you really want to update your experience, you can upgrade by the above method 3.

5. Where can I find the download address of iOS9 GM/ official firmware?

After the release of iOS9 GM or official firmware, Apple will provide firmware package download on its own developer website (GM version requires a developer account), or through "Software Update" on iTunes and mobile phones.

In addition, IT House will sort out and summarize the corresponding firmware download encyclopedia as soon as the firmware is released. Everyone can download it according to their respective models and brush it in with iTunes.

6. How to back up existing data before upgrading iOS9 GM/ official version?

In order to prevent unexpected situations, it is strongly recommended that you make a good data backup before upgrading, directly connect your device to iTunes, right-click your device logo at the top left of the interface, and then make a full backup. In this way, you can store your chat records, game files, and even the location and system settings of your movies.

In addition, you can also use the backup function in iCloud and the chat record cloud backup function of WeChat to make a secondary backup of important data, and leave yourself with enough regret medicine.

7. Can old devices such as iPad 2 and iPhone4s upgrade iOS9?

As far as the existing developer preview version Beta5 of iOS9 is concerned, the upgraded iPhone4s does have some problems compared with iOS8.4, such as slow speed, jamming, etc. It is not clear whether the GM version and the official version will be optimized separately. It is recommended that users who use older equipment models pay attention to the actual experience of subsequent upgrades before deciding whether to update or not.

However, it is very practical to slim down the App Thinning application provided in iOS9 and reduce the space required for updating, especially for users of 16GB version.

8. What are the changes and new functions of 8.iOS9? Is it worth upgrading?

More proactive and intelligent Siri voice assistant, new Spotlight search and Siri suggestion.

As can be seen from Apple's official preview, the new Siri integrating Spotlight search screen and suggestion function will be a highlight of this conference. First of all, the speed and accuracy of the basic voice search will be increased by 40%, and it will also have the ability to search for pictures and information in third-party applications (which requires API support); Secondly, Siri will become more active, trying to guess what you will do next according to your usage habits, geographical location information and related application information, and try to solve it in advance; Finally, its voice wake-up mode may no longer be limited to charging.

Brand-new dual-account authentication mechanism

Previously, Apple adopted a two-step verification mechanism. However, since iOS9 Beta3, Apple has tried to join a more powerful dual authentication mechanism. Simply put, the verification code has been upgraded from the existing four digits to six digits. When you log in your Apple ID on an iOS9 device or OS X El Capitan, or log in through a webpage, a six-digit verification code will automatically pop up on the device you trust, and users must log in with this verification code, instead of the original 14 digit.

For the detailed differences between the two-step authentication mechanism and the two-step authentication mechanism, please refer to "Two-step Doubling: Detailed Explanation of Apple's iOS9 Beta3 New Authentication Mechanism".

New Chinese and English fonts and multi-tasking management interface

▲ The change of default font of Apple iOS9 also brings obvious difference to the first impression. English has become San Francisco like Apple Watch, and Chinese fonts have been changed to Apple Plaza.

▲ Multi-tasking management interface, the original tiled cards have evolved into a brand-new three-dimensional cascade, and the 3D depth of field effect is beautiful. In addition, the increase of the card area itself improves the convenience of operation, and the top search bar function is also added in the settings.

More powerful memo function

IOS9 has added a new memo function. In addition to text, we can finally add check boxes, pictures, videos and even hand-drawn functions, and support iCloud synchronization. The contents of the memo can also be directly exported as PDF and saved in iBooks, which is convenient and quick.

Brand-new maps and bus, subway and pedestrian navigation functions.

Apple Maps has a brand-new transit function, which is to increase the route planning and navigation functions of public transportation, subway and walking, and support nearby search (although the existing version of nearby search is nationwide), and will support more than 300 cities across the country. In terms of ease of use, it's very good. For example, in walking navigation, there are 3D stereoscopic view, voice navigation, travel time estimation and so on. The only regret is that there is no offline function.

Brand-new in-app jump function

If you jump from one application to another, a "Return to xxx" button will appear in the upper left corner of the later opened application, and you can directly return to the previous application after clicking it. Compared with the previous direct automatic jump, there is one more confirmation step that needs manual selection, which can reduce the problem of automatic jump of application interface in the case of wrong click.

Brand-new low battery mode

Brand-new low-power mode, you can see the specific power consumption of each application in the foreground and background. When the low power mode is turned on, the battery will turn yellow, which can provide the iPhone with up to 3 hours of extra battery life. When the power is lower than 20%, the information prompt window also contains the "Turn on low power" mode button.

"Point" function with higher degree of function customization

The "AssistiveTouch" dot function in iOS9 is more customized, which not only allows users to customize the number of specific icons, but also allows users to customize individual functions.

IOS9 for IPad has unique split screen, QuickType and multi-tasking function.

▲ A shortcut bar has been added to it ▲QuickType, which provides functions such as paste and copy, text format, etc. You can also use two fingers to slide into a touchpad, and the cursor position can be easily controlled. In other words, the function of sliding the keyboard area with two fingers to control the cursor position was also used in the previous iPhone version of iOS9, but it was cancelled in the later Beta version.

▲Slide Over: Support to open another application while the existing application remains open, which can only be displayed on the side;

▲ Split view: true dual tasks on the same screen, and the ratio between the two can be freely dragged and adjusted, but this function only supports iPad Air 2；; ;

▲ Picture in Picture: The position of the video window can be dragged at will.

Apple News and Apple Music, which are temporarily out of reach for domestic users.

In addition, iOS9 has also brought many changes in details, such as the new avatar display function under the SMS function, the clearer on/off state of HDR, flash and other functions under the photo application, the easier state switching of uppercase and lowercase keyboards, and the new screen capture in the photo application. In terms of game ability, Apple has added several APIs to iOS9. With the help of Metal, the efficiency of actually running games will be significantly improved. In addition, iOS9 also supports APP Thinning, which only downloads the application resources required by the current model, greatly reducing the storage space occupied by the application and the volume of the updated file.

Some additional small expectations for iOS9:

It is rumored that both iPhone6s and iPhone6s Plus will support 3D Touch pressure touch function. What kind of new experience can iOS9 give people under pressure touch? With the addition of the new1200,000 pixel iSight camera, will Apple, which focuses on the automatic mode, also play the manual professional camera mode? Whether Apple Watch-style lock screen dynamic wallpaper will also come to iOS9, we will wait and see tonight.

9. What is the software compatibility of 9.iOS9? What are the problems? How about stability, fever and endurance?

After several iterations, the current iOS9 developer preview version of Beta5 has been quite stable and smooth, and many bugs have been fixed, such as the third-party input method window that particularly affects the daily experience. Take the iPhone6 as an example. The fever is quite obvious in the process of automatically restoring iCloud backup just after brushing, which is obviously hot. It will return to normal after a while, and the actual battery life is slightly longer than that of iOS8.4. Under heavy use, both of them are not optimistic and can only last for about 7 hours. At present, the phenomenon of frame dropping is still visible to the naked eye in the process of multi-task animation restoration. The icons on the thumbnail of the main page occasionally disappear collectively under multi-task, and a few applications will have flashback problems under some operations. I believe these problems will be better solved in the upcoming version of iOS9 GM.