Specifications

iPhone 4 Symptom Charts — Sound Issues 79
2012-02-21
3. Test with known-good
headphones.
Substitute known-good Apple
Earphones with Remote and
Mic. Open the Voice Memos
app. Using the headphone
microphone, create a recording
and play it back.
Did the audio record as
expected?
Yes Replace Apple Earphones. If user
has third-party headphones, refer to
manufacturer for support.
No Go to step 4.
4. Erase all content and settings.
Go to Settings > General >
Reset > Erase All Content and
Settings.
Warning: This will delete all
user data on the device.
Open the Voice Memos
app. Using the headphone
microphone, create a recording
and play it back.
Did the audio record as
expected?
Yes Issue resolved.
No Go to step 5.
5. Restore with iTunes.
Restore the device using
the latest version of iTunes.
If restore fails, attempt DFU
restore.
Open the Voice Memos
app. Using the headphone
microphone, create a recording
and play it back.
Did the audio record as
expected?
Yes Issue resolved.
No Determine if the issue is caused by
accidental damage. Refer to the Visual
Mechanical Inspection guidelines.