8 ways to fix iTunes error 21

In Iphone
This may have occurred to you that you are trying to restore your iPhone but no matter what you do, your iPhone will not restore because of error iTunes iPhone Error 21 or 21 keeps popping up! It’s like Whack-amole, you keep trying to restore, but that iPhone Error 21 hell come again. Generally these errors are the result of some security software package interfere with Your return, and usually has an easy fix.
 So here we show you 8 different ways by which you can fix iTunes error iPhone Error 21 or 21, return with ease, and continue to use your device!
  1. What is iTunes error 21 (iPhone Error 21)?
  2. Solution 1: how to fix iTunes error iPhone error 21 or 21 without loss of data
  3. Solution 2: Restart iTunes to fix iTunes error 21
  4. Solution 3: fix iTunes error 21 with updating iTunes
  5. Solution 4: Disable anti-virus to fix iPhone error 21
  6. Solution 5: remove unnecessary USB devices
  7. Solution 6: check the Sensor Cable
  8. Solution 7: how to fix iTunes error 21 via recovery mode
  9. Solution 8: check the modified or obsolete software

Tags: #iTunes error 21

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