iPhone 12 PRO MAX Boot loop error 4013 FIXED!!

Let's take a look at how to repair boot loop and error 4013. Very common issue on iphones X to 12.
How to enter to iphone recovery mode:
Quick-press the Volume Up button.
Quick-press the Volume Down button.
Long-press and hold the Side button until you see the Recovery mode screen.

Apple devices is a free software that you can download from e.g. windows store

How to leave recovery mode:
Connect your device to your computer using the cable that came with your device. Don't disconnect your device from your computer.
Press and quickly release the volume up button. Press and quickly release the volume down button. Press and hold the side button until you see the Apple logo.

It is important that you leave recovery mode before you start your repairs.
Diagnosing proximity sensor issue. Just remove the flex cable and try to start the phone if it starts the issue is in that module.

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