Specifications

iPhone 4
Contents
About This Guide
Updates 9
Updated 21 February 2012 9
Updated 16 November 2011 9
Introduced 14 October 2011 10
Note About Images In This Guide 10
Feedback 11
Basics
Overview 13
Scope of this Document 13
iPhone Model Feature Dierences 13
iPhone 4/4S at a Glance 13
System Requirements 14
Identifying iPhones 15
Model Dierences 15
Serial Number and IMEI/MEID Location 16
Conguration Codes 18
Apple ID 19
Additional Resources 20
Troubleshooting
Cleaning Procedures 22
General Troubleshooting 25
Backup User Data 25
Common Troubleshooting Procedures 26
Charge Battery 27
Restart 28
Reset 28
Force Quit an App 29
Erase All Content and Settings 30
Restore 31
Recovery Mode Restore 31
DFU Restore 33