It might have happened to you that you"re trying to restore your iPhone but no matter what you do, iPhone won"t restore because an iTunes error 21 or iPhone Error 21 keeps popping up! It"s lượt thích a whack-a-mole, you keep trying to restore, but that infernal iPhone Error 21 comes again. Generally, these errors are a result of some security software package interfering with your restore, và it usually has an easy fix.Bạn đã xem: phía dẫn bí quyết sửa lỗi 21 chạm chán phải trong qua trình restore iphone 4


So here we"re showing you 8 different ways by which you can fix iTunes error 21 or iPhone Error 21, restore with ease, & continue using your device!

What is iTunes Error 21 (iPhone Error 21)?

Now before we get khổng lồ the nitty-gritty"s of how to fix iTunes Error 21, I"m sure you must be wondering what is iTunes Error 21 (iPhone Error 21) to begin with, & why does it have this strange obsession with your phone! The most common reason for iTunes Error 21 is that your iTunes is trying to download the restore files (.ipsw) but is, unfortunately, being blocked from authentication. This may be due lớn a hardware error, or maybe there is a communication failure between your device & the servers. However, fret not, we will show you how to fix that iPhone Error 21 easily và effectively and get back to lớn leading your iPhone engrossed lives!


Solution 1: How lớn fix iTunes error 21 or iPhone error 21 without losing data

One of the biggest concerns you probably have while attempting your restore and trying khổng lồ fix the iPhone Error 21 is whether your data is safe. That is a legitimate concern as a lot of techniques out there might or most certainly will lead lớn data loss. That is why we"re starting our các mục with a technique that can ensure there won"t be any data loss. To ensure this you can use an easy-to-use and convenient software called Dr.Fone - System Repair

Your memories và data are all precious and you shouldn"t risk them. Dr.Fone seems to lớn place great emphasis on data preservation and as such is the recommended means to lớn fix iPhone Error 21. Furthermore, its convenience & mile-purpose nature help as well.Bạn đang xem: Sửa lỗi khi restore iphone 5s 5 se 4s 6+ 6s 6s plus


Dr.Fone - System Repair

Fix iTunes error 21 or iPhone error 21 without Data Loss

Only fix your game ios to normal, no data loss at all.Works for all models of iPhone, iPad and iPod touch.Fully compatible with the latest quả táo version.Bạn sẽ xem: trả lời fix lỗi 21 lúc restore iphone 4

Available on: Windows Mac Start tải về Start tải về 3981454 people have downloaded it

Steps khổng lồ fix iTunes error 21 with Dr.Fone

Step 1.

Bạn đang xem: Hướng dẫn fix lỗi 21 khi restore iphone 4

Choose "System Repair"

After launching the Dr.Fone toolkit, you"ll find "System Repair". Click on that.

Step 2. Connect the iPhone


Step 3.

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tải về the firmware

Dr.Fone will identify the iPhone mã sản phẩm and offer the latest tiện ích ios version for you to lớn download. Simply click "Start" & wait for the process lớn complete.

Step 4. Fix iTunes error 21

Once the download is complete, Dr.Fone will automatically start repairing the iOS, except this time you won"t be bothered with an iPhone error 21 message!

Tips: If these steps won"t work, probably the iTunes components are corrupted. Go khổng lồ repair your iTunes & try again.

Start tải về Start download

Solution 2: Repair iTunes lớn fix iTunes error 21

You remember how I mentioned that the iTunes Error 21 may be a result of the iTunes being blocked. Well, sometimes simply repairing the iTunes can prove enough to lớn fix iTunes Error 21. So you might wanna" lead with that.

Operate based on the following steps. Then you can fix iTunes error 21 quickly:

Download the Dr.Fone toolkit. Then install, start it up, và click "Repair" in the main menu. In the new window, click "iTunes Repair" from the left column. Then connect the tiện ích ios device lớn your PC. First, we should exclude the connection issues. So let"s choose "Repair iTunes Connection Issues".If iTunes error 21 still pops up, click "Repair iTunes Errors" khổng lồ verify and repair all iTunes components.Lastly, if iTunes error 21 is not fixed by the above steps, click "Advanced Repair" to have a thorough fix. Related Posts