Hướng Dẫn Fix Lỗi 21 Khi Restore Iphone 4 S 8, Sửa Iphone Restore Báo Lỗi 1, 21,23, 28, 1600

It might have happened lớn 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 lớn restore, but that infernal iPhone Error 21 comes again. Generally, these errors are a result of some security software package interfering with your restore, & it usually has an easy fix.Bạn sẽ xem: phía dẫn biện pháp sửa lỗi 21 gặp mặt 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 lớn 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) lớn begin with, and 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 lớn fix that iPhone Error 21 easily và effectively & get back lớn leading your iPhone engrossed lives!


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

One of the biggest concerns you probably have while attempting your restore và trying to 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 menu with a technique that can ensure there won"t be any data loss. Lớn ensure this you can use an easy-to-use & convenient software called Dr.Fone - System Repair

Your memories & data are all precious and you shouldn"t risk them. Dr.Fone seems lớn place great emphasis on data preservation and as such is the recommended means lớn fix iPhone Error 21. Furthermore, its convenience & mile-purpose nature help as well.Bạn vẫn 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 ios to normal, no data loss at all.Works for all models of iPhone, iPad & iPod touch.Fully compatible with the latest game ios version.

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


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

Steps to lớn fix iTunes error 21 with Dr.Fone

Step 1. 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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download the firmware

Dr.Fone will identify the iPhone model and offer the latest quả táo version for you to download. Simply click "Start" and wait for the process khổng lồ complete.

Step 4. Fix iTunes error 21

Once the tải về 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 lớn repair your iTunes & try again.

Start download Start download

Solution 2: Repair iTunes to lớn fix iTunes error 21

If there"s a real problem like iTunes error 21, having iTunes components repaired will be effective. No matter the iPhone Error 21 is a temporary glitch or a component corruption issue, with the following iTunes repair tool, you can take care of it easily.

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 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 game ios device khổng lồ 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" to lớn verify và repair all iTunes components.Lastly, if iTunes error 21 is not fixed by the above steps, click "Advanced Repair" lớn have a thorough fix.
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