The iPhone Stuck on update completed screen issue has been reported by numerous users. In fact, iPhone can get stuck on different stages of the updating process, and getting stuck on this final stage is definitely the most irritating one, as you are just one step to completing the update. Still, there are many effective solutions that can save your phone. Our team has collected info and done experiments on this issue, then finally concluded the 5 best solutions to fix the problem.

1. Hard Reboot iPhone

Let's start with a classic fix that will help with any kind of stuck scenario. A hard reboot will force your iPhone to end the Updating process and restart. To hard reboot different models of iPhone, follow the guide below.
hard reboot iphone
For iPhone 6 or former: Hold the "Power" and the "Home" button simultaneously for about 13s. Your phone will then restart after a vibration.
For iPhone 7 and 7 Plus: press the "Sleep/Wake" and "Volume Up" buttons simultaneously until your device restarts.
For iPhone 8 and later: press the "Volume Up" button and release it immediately, then press the "Volume Download" button and release it, too. Hold down the "Power" button until you see the Apple logo.

2. Clear Up Local Space

Normally, the phone might get stuck in any stage of the updating process when there is no enough space in its local storage. This is often the case with iPhone 8, iPhone X or 11 users with 64GB local storage, considering the phone is pre-loaded with a bunch of data even if it's new. To solve iPhone X stuck on update completed screen, you can first complete the last solution, and then delete the useless photos, videos, apps or other documents to free some spaces.

3. Use Computer to Update iPhone

Normally, users would update the iOS on our phones directly. But if you have tried several times only to find that didn't work, you can use iTunes on your PC or Finder on your Mac to update the phone. Updating from the computer can avoid the problems caused by over-the-air delta transfer and prevent the phone from getting stuck while updating. To update iPhone from your computer, just follow the instructions below.
update iphone from computer

Windows

Step 1: Update iTunes to the latest version on your computer;
Step 2: Connect iPhone with the computer. After it has been detected, go to "Summary" > "Check for Update";
Step 3: Tap on "Download and Update" and wait for iTunes to install the update for you.

Mac

Step 1: Connect your iPhone to the Mac and open Finder;
Step 2: Find your iPhone in the left sidebar under the "Locations", then tap on it;
Step 3: You are now in the General tab. Press the "Check for Update" button. Finally, press the "Download and Update".

4. Fix iPhone Stuck on Update Completed Screen with Joyoshare UltFix

It can't be ignored that the problem can be caused by system errors or bugs. In this case, we need the help of a professional iOS system recovery program, Joyoshare UltFix. In fact, it is capable of resolving similar problems without data loss, e.g. iPhone won't update.

Joyoshare UltFix provides great convenience, as it will put your device into the recovery mode with one-click free. It fully supports almost any models of iPhone, iPad, iPod and Apple TV with iOS 13. As long as you download the software, your problem will be eliminated in just a few minutes.

Key Features of Joyoshare UltFix iOS System Recovery:

Fix iPhone stuck on update completed screen without data loss

One-click free to enter/exit the recovery mode

Support all iPhone models and iOS versions (iOS 13)

Repair iOS issues with just a few clicks

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