Specifications

iPhone 4 Verication Testing — Functional Testing 186
2012-02-21
Test Audio Playback
1. Launch the Music (or iPod) app, choose and play a song. Adjust volume slider if necessary.
Verify that music is heard through iPhone speaker along bottom edge.
Note: There is only one speaker on the bottom of iPhone. The mesh opening to the right of
the dock connector is the speaker; the mesh opening on the left is the microphone.
2. Plug in known-good Apple Earphones with Remote and Mic. Music should continue playing,
now through the earphones. Verify that sound is not distorted and plays correctly in both
left and right channels.
3. Double-click the earphones remote. Music should advance to the next song.
4. Unplug earphones. Music should pause when earphones are removed.
Note: If distortion or a missing channel is found during testing, inspect for contaminants in
audio jack preventing proper electrical connection.
Test Audio Recording
1. Launch the Voice Memos app.
2. Record a short voice memo by tapping the red circle in the lower left corner of the screen.
3. When nished recording, tap the black square in the lower right corner.
4. Tap the list icon (3 black lines) in the lower right corner. Select your recording from the list
and tap again to playback.
5. Recording will playback using the receiver. Verify playback is accurate.
6. Plug in known-good Apple Earphones with Remote and Mic.
7. Repeat steps 2-4.
8. Recording will playback using the earphones. Verify playback is accurate.