How to Put Your iPhone in Diagnostics Mode, by Gauging Gadgets on YouTube. 1 min 29 s.
- Video length
- 1 min 29 s
- Time to do it
- 5 minutes
- Difficulty
- Easy
- Steps
- 8
What you need
Steps
Back up your iPhone to iCloud or a computer before you start, so you can restore your data if anything goes wrong later.
Turn the iPhone off. Press and hold the side button and either volume button, then drag the power slider across the screen and wait for the display to go black.
With the phone switched off, press and hold both volume buttons at the same time. Keep them held and do not let go.
While still holding both buttons, plug a charging cable into the iPhone. Connect the other end to a charger or a computer so the phone gets power.
Watch the screen. When the diagnostics screen or the Apple logo appears, release both volume buttons.
Leave the phone connected and follow the prompts on screen. The tests check hardware such as the battery, display and sensors.
Note the results or reference number shown at the end. An Apple Support advisor can review the same session with you and advise on a repair.
To leave diagnostics mode, press and release volume up, press and release volume down, then hold the side button until the Apple logo appears.
Tips and common mistakes
Use a cable and charger you know work, because a loose or faulty cable often stops the phone from entering diagnostics mode.
Hold both volume buttons before you plug the cable in, not after, or the phone may just boot up normally.
Keep the phone plugged in for the whole test so the session does not cut off partway through.
Diagnostics reports hardware faults only. It will not fix crashes or glitches caused by apps or iOS.
Questions
Will diagnostics mode erase anything on my iPhone?
No. The hardware tests only read the phone, so your photos, apps and messages stay in place. A backup is still worth having in case you need a repair or restore.
Do I need to contact Apple Support to run the tests?
You can start the session yourself at home. Apple Support uses the same session when you are troubleshooting a fault, and can read the results with you.
What if my iPhone will not enter diagnostics mode?
Check that the phone is fully powered off, hold both volume buttons before connecting the cable, and try a different cable or charger.
This guide was drafted from the video's details and general task knowledge. It has not been checked against the full video. Check the video and relevant product instructions before following a procedure. Report a correction.
