How to Check for Hardware Error on iPhone 4S Quickly and Easily

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If you think your iPhone is having some problems recently, here’s a quick way to identify if it has a hardware problem or not.

With iOS 5, Apple had built a ‘Diagnostics and Usage’ feature which compiles all software or hardware errors on your iPhone. This is a great feature that can help you identify your iPhone’s problem before it gets worse.

To access this handy feature:

Editor's note: learn more by reading our ebook on starting your own iPhone repair & unlock business
  1. Go to Settings > General > About.
  2. Scroll down to the bottom and tap on ‘Diagnostics & Usage.’
  3. Tap on ‘Diagnostics & Usage Data.’
  4. On this screen, you can see a list of error logs. The most common one is Low Memory error.

Now, how can tell you if there’s a hardware issue? Just look for an entry called panic.plist.

This is a common terminology used by Apple and it’s derived from the word Kernel Panic which means an action taken by an operating system upon detecting an internal fatal error from which it cannot safely recover. If you don’t see this entry, then you don’t have to worry about anything.

The guys and girls of Genius Bars at all Apple Stores worldwide use the same technique for troubleshooting. When they see a panic.plist entry, they would usually arrange for a phone replacement, if you’re eligible.

Do you have the panic.plist entry on your iPhone?

How to Check for Hardware Error on iPhone 4S Quickly and Easily was last modified: August 3rd, 2018 by Joe Wang

Comments & Discussion

  1. Very useful :)
    My five cents contribution….i spended time to find out something for testing the hardware sensors.
    I discover this ''device explorer pro'', while searching for sensors.
    It' was usefull to me cause i discovered the proximity sensors wasnt working properly.
    Hope it'd help someone else.
    Have a great time and keep on doing great job.

  2. Hi Richard Kerr, thanks for sharing this. I wanted to check my new iPhone 4S and went on Google to search how can I check my iPhone hardware and found your page. I was able to get the information I needed on my phone.

  3. Hi, Richard, yes i do have the panic list after i dropped my phone into water and the warantty has void.

    The phone still working except that it will automatically reboot after a few minutes, can it be repair by the phone technician?


  4. my iphone 4s camera is not working even after restotring and upgrading to latest update. Must be a hardware problem …how to fix it ? warranty is void too……

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