iOS11 update failed solution:
Generally, updates fail because
of the instability of the network. Try several times and try again
several times to solve the problem. Or flow more cases, open 4G, with
their own flow, do not use WiFi authentication can. The Internet also
says that the phone opens the flight mode. Then turn on the Wi-Fi and
update it.
Ways to upgrade iOS11:
- through the installation of iOS11
description file upgrade, first delete your phone has been installed in
the description file, copy iOS 11 description file, open with Safari
browser, in accordance with the prompt to install the description file,
and restart the phone. After reboot, you will receive the iOS 11 system
OTA file, and upgrade the file to complete the upgrade.
- another way to upgrade is to restore firmware
through iTunes. First, download the iOS 11 firmware package that meets
your device and connect your device to the computer. You can backup the
data in advance with iTunes. Then hold down Shift (Windows) or Alt /
Option (Mac). When you do this, click the update button. You will then
be prompted to select the IPSW file you want to update. Select the iOS11
firmware you downloaded before, and wait for the computer to install
successfully to complete the upgrade.
However, when the iOS upgrade
fails, there are some things that are very annoying to us. Some users,
after they upgraded the iOS 11 system, found that all data on the iOS
device disappeared. Of course, some lucky users will back up his data
before the upgrade. Some hapless users forget to back up their data, and
can they be retrieved without backup data? At this point, you can use
third party software to help you recover.
iPhone Data Recovery is a Software for users to recover lost Contacts, Messages, Photos, Videos, Notes, Camera Roll, Photo Library, Message Attachments, Call History ,SMS ,App data,like WhatsApp,Line,Kiki,Viber and more datas.No
matter the reason why your lost your data,such as jailbreak, iOS
upgrade or factory settings,you can recover the datas through the iPhone Data Recovery. It applies toiPhone 8/7/6s/6/5s/5/4s/4.
If you need this help, you can download software free of charge and often try：
How do I recover data lost when the iOS 11 system upgrade fails
Method 1. Free restore lost data in iPhone 7 from iCloud backup
If you have created iCloud backups for you new
iPhone 7 data, you may simply restore or extract the iCloud backups to
iPhone 7 with ease:
Turn on your iOS device.
In the Setup Assistant, proceed to "Set up your device", tap Restore from a Backup, then sign in to iCloud.
Proceed to "Choose backup", then choose from a list of available backups in iCloud.
Method 2. Free restore lost iPhone 7 data from iTunes backup
If you have used iTunes to backup your iPhone 7
data, you may also follow below steps to free restore lost iPhone 7 data
from iTunes backup:
1. Open iTunes on PC or Mac that you used to backup iPhone 7 data;
2. Connect iPhone 7 to the computer with a USB cable.
Follow the onscreen steps to enter iPhone 7 pass-code or to trust This Computer.
3. Select iPhone 7 when it appears in iTunes.
4. Choose Restore Backup in iTunes and look at the date and size of each backup and select the most relevant.
5. Click Restore and wait for the restore to be finished.
Method 3. Use iPhone data recovery software to recover lost data
How to recover lost data in iOS device：
Three Part to Get Disappeared and Missing Data Back from iOS Devices:
Part 1. Recover Contact from iPhone Device Directly
Step 1. Connect iOS Device with Computer
Launch dr.fone toolkit on your computer. Use the USB cable that comes with your iOS device to connect your iPhone, iPad or iPod touch, to your computer. Click on "Data Recovery" and select "Recover from iOS Device" option.
Tips: Before running dr.fone, you're supposed to download the latest version of iTunes. To avoid the automatically sync, don't launch iTunes when running dr.fone toolkit. I suggest you disable the automatical syncing in iTunes beforehand: launch iTunes > Preferences > Devices, check “Prevent iPods, iPhones, and iPads from syncing automatically”.
Step 2. Scan Your Device for Lost Data on It
Simply click the "Start Scan" button to let this program scan your iPhone, iPad or iPod touch to scan for deleted or lost data. The scanning g process may last a few minutes, depending on the amount of data on your device. During the scanning process, if you see that the data you're looking for is there, then you can click the "Pause" button to stop the process.
Step 3. Preview the Scanned Data
The scan will take you some time. Once it's completed, you can see a scan result generated by the program. Data both lost and existing on your device are displayed in categories. To filter out the deleted data on your iOS device, you can swipe the option "Only display the deleted items" to ON. By clicking the file type in the left side, you can preview the found data. And you can see there is a search box on the top right of the window. You can search for a specific file by typing a keyword in the search box.
Step 4. Recover Data from Your iPhone/iPad/iPod touch
When you find the data you need, just put the check mark in front of the box to select them. After then, click the "Recover" button at the bottom right of the window. By default, the recovered data will be saved to your computer. As for text messages, iMessage, contacts, or notes, when you click Recover, a pop-up will ask you to "Recover to Computer" or "Recover to Device". If you want to put these messages back to your iOS device, click "Recover to Device".
Part 2. Recover Contac from iTunes Backup
Step 1. Choose Recovery Mode
Launch dr.fone and select "Recover from iTunes Backup File" from "Data Recovery" tool. After then, the iTunes backup recovery tool will detect all iTunes backup files on this computer and display them in the window. You can confirm which one is the one you need according to the date it has been created.
Step 2. Scan Data from iTunes Backup File
Choose the iTunes backup file that contains the data you want to recover and click "Start Scan". It will take a few minutes to extract all data from the iTunes backup file. Be patient.
Step 3. Preview and Recover Data from iTunes Backup
After a few seconds, all data in the backup file will be extracted and displayed in categories. You can preview them one by one before recovery. Then you can selectively mark and recover those you want by pressing the "Recover" button at the bottom. Now contacts, notes and messages can be directly recovered to your iOS device if you keep your iOS device connected with your computer via a USB cable during the recovery process.
Tips: you can see there is a search box in the result window. From there, you can type in the name of a file to search for it.
Part 3. Recover Contact from iCloud Backup
Step 1. Choose Recovery Mode
After running dr.fone toolkit, choose the recovery mode of "Recover from iCloud Backup Files" from "Data Recovery" on the dashboard. Then you'll see the window below. Enter your iCloud account and password to login. dr.fone takes your privacy seriously. We never keep a record of any your Apple account info or content at any time during your sessions.
Step 2. Download iCloud Backup File
When you logged into iCloud, the program can find all iCloud backup files in your account. Choose the one where you're going to recover data and click on the "Download" button.
And then in the pop-up, you can choose the type of files you would like to download. This will reduce the time of downloading the iCloud backup file. After that, you can scan the iCloud content now. Click on the "Scan" button to begin. It will take you some time. Just wait for a moment.
Step 3. Preview and Recover Data from iCloud Backup File
The scan will be complete in a few minutes. Once it stops, you can preview almost all data in your iCloud backup file, like contacts, messages, photos, and more. Check them one by one and tick the item you want. Then click on the "Recover to Computer" or "Recover to your device" button to save them on your computer or your device with one click.
Now contacts, messages and notes can be directly recovered to your iOS device if your iPhone, iPad or iPod touch is connected with your computer with a USB cable during the recovery process.
In life, accidents happen at any moment, so we have to store our important data on the computer periodically in order to avoid losing data.
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