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IPhone XR freezes at the last digit of the pin code

From Repair Wiki
IPhone XR freezes at the last digit of the pin code
Device IPhone XR
Affects part(s) Motherboard
Needs equipment
Difficulty ◉◉◉◌ Hard
Type Soldering


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Problem description

iPhone XR will boot up normally but freeze and restart when pincode is entered

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Symptoms

  • Phone boots fine
  • Type in your pin code & at the last digit, it freezes, keeping that digit highlighted for about 30-60 seconds
  • Then the screen restarts and you're back at the pin code screen.

Solution

  • Check NFC (U_NFC_S) above CPU
  • It most likely has a hairline crack & requires to be replaced.
  • Once replaced, the phone will go through a "swipe to recover" screen in most cases, where you put in the pin code, it loads a white "Attempting Data Recovery" screen & takes about 10-20 minutes.
  • This is basically the operating system rewriting the NFC chip, so it can unlock.
  • Then, the phone will work fine afterwards


Migrated from old wiki