Specifications

iPhone 4 Symptom Charts — Sound Issues 77
2012-02-21
3. Test with known-good
headphones.
Substitute known-good Apple
Earphones. Play known-good
media or go to Settings >
Sound > Ringtone and select a
ringtone.
Is the headphone issue
resolved?
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.
Play known-good media or go
to Settings > Sound > Ringtone
and select a ringtone.
Is the headphone issue
resolved?
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.
Play known-good media or go
to Settings > Sound > Ringtone
and select a ringtone.
Is the headphone issue
resolved?
Yes Issue resolved.
No Determine if the issue is caused by
accidental damage. Refer to the Visual
Mechanical Inspection guidelines.