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For these issues, solutions exist. You can refer to the following guide to understand the reasons and best fixes for them.
1. Insufficient Storage Space after Upgrading to iOS 8.
Your device may indicate insufficient memory to install the official iOS 8 release.
Solution:
- Access Settings -> General -> Usage and identify apps consuming the most storage. Delete the least used ones. To view all apps, tap Show all Apps.
- Tap Delete App to complete device cleanup. Notably, Camera Roll and Messages often occupy the most space on your device.
- Backup your data by connecting your device to a computer and opening iTunes -> Summary -> select Back Up Now. Alternatively, on your device, go to Settings -> iCloud -> Backup -> Back Up Now
- If following the above steps doesn't improve memory, restart your device by pressing the Home + Power buttons simultaneously.
2. Unable to Delete Contacts List
To address this issue, follow these steps:
- Navigate to Settings > Mail, Contacts, Calendar > Show In App Switcher
- We hope Apple resolves this issue soon in upcoming releases.
3. Unable to Install Apps from Appvn
- When encountering this error, the device indicates the software is untrustworthy. Although installed, apps cannot be opened.
Fix:
- If faced with this issue, no definitive solution exists yet. You can attempt switching to alternative sources for downloading and installing.
4. Updating iOS 8 on Faulty iDevices
While downloading iOS 8, using iTunes may encounter errors halting the download process.
Fix:
- First, try updating iOS 8 once more.
- Restart the device and commence the iOS 8 update process again.
- If updating via iTunes fails, try updating directly on your iDevice.
Note: Updating to iOS 8 requires at least 4.6 GB of free space.
5. Error 'iOS Update Failed due to Unknown Error (6)' on iTunes when updating.
This can occur when updating to iOS 8 on iPhone 5, the original device, and not Jailbroken.
Fix:
- Attempt updating once more.
- Restart the device and perform the update again.
- Update directly on your device.
https://Mytour.vn/nguyen-nhan-va-cach-khac-phuc-loi-khi-nang-cap-len-ios-8-935n.aspx
Here are the top 5 common issues users often encounter when upgrading to iOS 8. You can read to consider your upgrade or troubleshoot your device using the methods above.
