How to Update to iOS 15
如何更新到 iOS 15
iOS 15 Update Problem
iOS 15 更新問題
How to Downgrade
如何降級

iOS 15 更新終極指南

• iOS 15 新功能
• 為 iOS 15 更新做準備
• 如何更新到 iOS 15
• 將 iOS 15 降級到 iOS 14
• iOS 15 更新提示和技巧

第 1 部分。iOS 15 令人敬畏的新功能

有了 iOS 15，你的 iPhone 肯定會煥然一新。蘋果聲稱 iOS 15 旨在“讓你的 iPhone 煥然一新，並將其提升到一個全新的水平”。我們期望的是，改進不僅在外觀上，而且在性能上。讓我們看看 iOS 15 為我們帶來了哪些新功能。

ios 15 features - New Widgets

新小部件

  • 新的小部件供您獲取更多信息。
  • 從不同的尺寸中選擇並安排您喜歡的。
ios 15 features - new app library

新的應用程序庫

  • 將您的應用程序組織到一個簡單、易於導航的視圖中。
  • 您最常用的應用程序始終只需輕輕一按。
ios 15 features - new message

新消息

  • 九個對話位於對話列表的頂部。
  • 群組對話可以通過添加照片或擬我表情來設置視覺標識，或者選擇表情符號。
ios 15 features - security

隱私與安全

  • 獲取有關 App Store 的信息，以幫助您了解隱私慣例。
  • 當應用程序使用您的麥克風或攝像頭時，屏幕頂部會出現一個指示器。
ios 15 features - new maps

新地圖

  • 使用自行車道、路徑和道路獲取騎行路線。
  • 世界各地美食、購物和探索的好地方指南。
ios 15 features - homekit

家庭套件

  • 設置您的燈光以改變全天的色溫。
  • 攝像機和門鈴可以識別您在“照片”應用中標記的人。
ios 15 features - new Siri

新 Siri

  • 對於較長的句子，Siri 生成的聲音聽起來會更自然。
  • 幫助您查找網絡答案並發送音頻消息
ios 15 features - safari

新的 Safari

  • 用七種不同的語言翻譯網站。
  • 點擊隱私報告按鈕以更好地了解網站如何處理您的隱私

第 2 部分。準備 iOS 15 更新

實際上，將您的 iPhone/iPad/iPod touch 更新到 iOS 15 是非常容易和簡單的。但是為了讓旅途順利和安全，您最好先做好以下準備工作。特別是，在您做任何事情之前對您的數據進行完整備份。為什麼?在任何情況下，沒有人會遭受iOS數據的丟失。

2.1 檢查您的設備是否兼容 iOS 15（或 iPadOS 14）

iOS 15 和 iPadOS 14 將適用於所有主要型號的 iPhone 和 iPad。需要注意的一點：某些支持 iOS 12 的機型（例如 iPhone 5/6）不再支持 iOS 15。以下是絕對可以安裝 iOS 15 的 iPhone、iPad 和 iPod 的完整列表。

蘋果手機
ios 15 compatible iphone

iPhone 2020 系列
iPhone 11、11 Pro 和 11 Pro Max
iPhone SE（第一代、第二代）
iPhone XS、XS Max 和 XR
iPhone X
iPhone 8 Plus
iPhone 8
iPhone 7 Plus
iPhone 7
iPhone 6S Plus
iPhone 6S

iPad
ios 15 compatible ipad

12.9 英寸 iPad Pro
11 英寸 iPad Pro
10.5 英寸 iPad Pro
9.7 英寸 iPad Pro
iPad 第 6 代
iPad 第 5 代
iPad Air 3
iPad Air 2
iPad mini 4

iPod
ios 15 compatible ipod

iPod touch 第 7 代

2.2 在 iOS 15 更新之前備份你的 iPhone/iPad

不要忽視：在 iOS 14 更新之前，對您的 iOS 設備進行完整備份非常重要。人們每年更新到新的 iOS 版本期間和之後都會發生很多數據丟失。因此，請記住在執行任何操作之前備份您的 iPhone/iPad 。每當發生任何意外情況時，我們都可以輕鬆地從 iOS 備份中恢復數據。這裡有 3 種方法可以輕鬆備份您的 iPhone/iPad。

backup iphone for ios 15 update
使用 Dr.Fone 備份 iDevice
  1. 將 iPhone/iPad 連接到 PC。
  2. 選擇數據類型。
  3. 一鍵在幾分鐘內備份 iPhone/iPad。
優點：
  • 進行完整備份，或僅備份選定的數據類型。
  • 輕鬆預覽備份數據。
  • 有選擇地將數據恢復到 iPhone/iPad。
缺點：

不是免費的

上電腦
上 Mac
backup iphone to icloud for ios 15

將 iDevice 備份到 iCloud

  1. 將您的 iPhone/iPad 連接到 Wi-Fi 網絡。
  2. 前往設置 > [您的姓名] > iCloud。
  3. 點擊立即備份。
優點：

官方備份解決方案。只有 5 GB 的免費存儲空間。

缺點：
  • 備份 iPhone/iPad 至少需要 20-30 分鐘。
  • 無法選擇性地備份和恢復 iPhone/iPad。
  • 無法預覽備份數據。
  • 需要將 iPhone/iPad 恢復出廠設置以恢復備份數據。
backup iphone in itunes for ios 15

使用 iTunes 備份 iDevice

  1. 在電腦上打開 iTunes。
  2. 將您的 iPhone/iPad 連接到您的計算機。
  3. 單擊文件 > 設備 > 備份，從摘要頁面單擊立即備份。
優點：
  • 無需下載第三方軟件。
  • 無需支付額外的 iCloud 存儲空間。
缺點：
  • 不支持 iPhone/iPad 的選擇性備份和恢復。
  • 備份和恢復過程緩慢。
  • 許多用戶在使用 iTunes 時會遇到錯誤。

2.3 為 iOS 15 更新騰出空間

When you update your iOS device wirelessly, you might see a message There's not enough available storage to download iOS 15. The new iOS 15 update installer is around 2GB. Your iPhone or iPad also requires 1.5 - 2GB additional free storage to install the iOS 14 update.

So, to update to iOS 15 smoothly, you need at least 4 - 5 GB of free space on your iPhone/iPad. To check available storage on iPhone, go to Settings > General > iPhone Storage. You can also follow the tips below to free up more space for iOS 15 update.

offload apps for ios 15 update
Offload Unused iOS Apps

Go to Settings > iTunes & App Stores and enable Offload Unused Apps. This will delete the iOS app but keep documents and data so you can restore it later from the App Store.

delete contents for ios 15 update
Delete Downloaded Contents

Videos and music usually takes a lot more storage than you expected. If you use Apple Music, go to Settings > Music > Downloaded Music. Swipe left on the music or album and tap Delete.

delete messages for ios 15 update
Delete Old Messages

Go to Settings > Messages > Message History > Keep Messages > select 30 days, and delete all the messages and attachments older than 30 days. See other tips on deleting iPhone messages.

erase phone for ios 15 update
Dr.Fone - Data Eraser (iOS)

With Dr.Fone - Data Eraser (iOS), we can easily delete all temporary files, App generated files, cached files and unused Apps to free up space. And it also compresses iPhone photos without quality loss.

Part 3. 3 Ways to Update to iOS 15

When the iOS 15 update comes out, your iPhone/iPad/iPod touch will receive the update notice. Generally there are two methods to install iOS 15 on your iPhone, iPad, or iPod touch: Over the Air and iTunes. You can choose either method to update your iPhone/iPad to iOS 15 based on actual situations.

3.1 Update to iOS 15 wirelessly and using iTunes

update to ios 15 over wifi

Update to iOS 15 Wirelessly

  1. Plug your device into power and connect to the Internet via Wi-Fi.
  2. Tap Settings > General > Software Update.
  3. Tap Download and Install.
  4. Tap Install. Or you can tap Later and choose Install Tonight or Remind Me Later.
  5. If asked, enter your passcode.
update to ios 15 with itunes

Update to iOS 15 via iTunes

  1. Install the latest version of iTunes on your computer.
  2. Connect your iOS device to computer.
  3. Open iTunes and select your iPhone/iPad/iPod touch.
  4. Click Summary, then click Check for Update.
  5. Click Download and Update.
  6. Enter your passcode of your iOS device.

3.2 Update to iOS 15 in 1 click

Steps to update to iOS 15:
  • Connect your iOS device to PC and launch Dr.Fone.
  • Click on the “Repair” module, and go to the iOS Repair option.
  • Select either mode. Confirm your choice by selecting the displayed iOS 15 version and click on the “Start”.
  • Sit back and wait for a while as the application would start downloading the compatible firmware for your iOS device.
Dr.Fone - System Repair (iOS)
  • Downgrade iOS by flashing the previous firmware.
  • Can also update iOS on your iDevices.
  • No dependence on iTunes.
  • Fix all iOS system problems like iOS freezing, white Apple logo, etc.
Get for PC Get for Mac

Part 4. Don't like iOS 15? Downgrade iOS 15 to iOS 14

iOS 15 mainly focuses on the "new look". Quite a few users reported that iOS 15 lacks equal focus on performance and stability. If iOS 15 is causing issues on your iPhone or iPad and driving you crazy, you can actually downgrade from iOS 15 to iOS 14 before Apple stops signing iOS 14 firmware.

Downgrade iOS 15 with Dr.Fone

1
Launch Dr.Fone on your computer and select Repair.
2
Select the standard mode to downgrade your iPhone, iPad, or iPod touch.
3
Select iPhone model, and specify iOS 14 as the firmware you want to download.
4
Once the firmware is downloaded, click Fix Now.
5
After a few minutes, your iPhone will restart and you will have iOS 14 on your iPhone/iPad.

Notice:

  • Make sure to select the "Standard Mode". So your data will remain intact after you downgrade to iOS 14.
  • Dr.Fone - Repair can also help you fix various issues you face with iOS 15 update or downgrade.
  • Click on https://ipsw.me/product/iPhone to check whether the compatible firmware is available.
downgrade ios 15 to ios 14

Downgrade iOS 15 with iTunes

1
Backup your iPhone with Dr.Fone.
2
Go to ipsw.me, select your iPhone model and download the proper IPSW file.
3
Turn off Find My iPhone.
4
Connect your iOS device to computer and run your iTunes.
5
Put device into DFU mode.
6
Search your device icon on iTunes and click it > Choose Summary tab and, (For Mac) press "Option" and click "Restore iPhone (or iPad/iPod)..."; (For Windows) press "Shift" and click "Restore iPhone (or iPad/iPod)…".
7
Find previous iOS ipsw file you have downloaded, select it and click "Open".

Notice:

  • iOS 15 downgrade with iTunes may result in complete data loss. It's very important to backup your data first.
  • You cannot restore your device with the backup that you created with iCloud/iTunes before downgrading. So remember to backup your iPhone with a 3rd party backup tool.

Part 5. iOS 15 Update Tips & Tricks

apps crashing

iPhone apps crashing on iOS 15

App crashing on iOS 15 is the most annoying issue. It arises due to reasons like insufficient memory, system glitches, etc. Check how it is fixable now.

ipados stuck installing

iPadOS 15 stuck on installing

Many people attempted to install iPadOS 15, the first OS Apple tailored for iPad, but finally found the installation just got stuck. Check how to fix quickly.

itunes backup

Cannot restore iTunes backup

Apple’s suspension of iTunes updates may somewhat account for frequent failure to restore iTunes backup on iOS 15. Check how tech geeks resolve this.

downgrade ios 15

Downgrade from iOS 15

Downgrading from iOS 15 without computer may be an ideal option when iOS 15 does not fit your appetite. Follow this tutorial to start the iOS downgrade.

ios 15 update tips and tricks
bricked ipad

iPadOS 15 bricked iPad

iPadOS 15 comes with many amazing features. But what if iPadOS 15 just bricks your iPad before you can even access them. Well, you are not alone. Fixes here!

iphone locked

Cannot get into iPhone on iOS 15

There are many complaints that screen cannot be unlocked when iPhone asking for passcode after iOS 15 update. Find all the tested ways to get around.

music disappearing

Music disappeared after iOS 15 update

It’s disastrous for music lovers after iOS 15 update. This article is designed to troubleshoot this issue by providing 5 solutions to get back your music.

ios 15 lagging

iOS 15 lagging & crashing

If you too have faced iOS 15 crashing or lagging issues, it’s actually easier to fix than you think. Let's check how to fix crashing or lagging issues now.