Specifications

iPhone 4 Symptom Charts — Sound Issues 74
2012-02-21
Microphone Issues
Known-Good Parts & Materials Required: Dock Connector to USB Cable, computer running
the latest version of iTunes with a known-good USB port
Note: The microphone is located on the bottom edge of iPhone, on the left side:
Quick Check
Symptoms Quick Check
• Microphone not functioning
• Distorted sound from
microphone
1. If issue is with microphone built-in to
headphones, jump to Headphone Microphone
Issues.
2. Make sure case or protective lm is not
obstructing the microphone.
3. On the device, go to Settings > General >
Software Update to verify device has the most
up-to-date software. If unavailable, verify by
plugging the device into iTunes.
Deep Dive
Check Result Action
1. Clean the device.
Check microphone mesh
on bottom of device and
secondary mic on top of device
are not obstructed with lint or
debris. Attempt to clean any
debris in accordance with the
Cleaning Procedures.
Are you able to clean the
device?
Yes Go to step 2.
No Determine if the issue is caused by
accidental damage. Refer to the Visual
Mechanical Inspection guidelines.
2. Retest the device.
Open the Voice Memos app.
Create a recording and play it
back.
Did audio record as expected?
Yes Issue resolved.
No Go to step 3.