Specifications

iPhone 4 Symptom Charts — Connectivity Issues 69
2012-02-21
Deep Dive
Check Result Action
1. Inspect SIM card and tray.
Using the SIM removal tool,
eject the SIM card tray. Inspect
both the tray and the SIM
card for debris, corrosion, or
damage. Attempt to clean/x if
necessary.
Are both the SIM card and tray
undamaged?
Yes Go to step 2.
No Determine if the issue is caused by
accidental damage. Refer to the Visual
Mechanical Inspection guidelines.
Replace SIM card and/or tray as
appropriate.
2. Reseat SIM card.
Reinstall the original SIM card.
Is the SIM card issue resolved?
Yes Issue resolved.
No Go to step 3.
3. Test known-good SIM card.
Substitute a known-good SIM
card.
Is the SIM card issue resolved?
Yes Issue resolved. Replace SIM card with
the correct carrier-supported SIM card.
No Determine if the issue is caused by
accidental damage. Refer to the Visual
Mechanical Inspection guidelines.
Other Connectivity Issue
Deep Dive
Check Result Action
1. Verify whether any of the
troubleshooting ows apply to
the issue reported by the user.
Yes Jump to appropriate troubleshooting
ow.
No
Document reported failure and send
feedback to [e-mail]
stating that a suitable troubleshooting
ow wasn’t found.
Escalate through your usual channels
for further troubleshooting support.