User's Guide

Table Of Contents
APPLE CONFIDENTIAL — First Draft (1.10.11)
the cellular signal is weak
a temperature warning screen appears
Important: You cannot use iPhone while the temperature warning screen is displayed,
except to make an emergency call. If iPhone can’t regulate its internal temperature,
it goes into a deep sleep mode until it cools. You cannot make an emergency call
when iPhone is in this mode. Move iPhone to a cooler location and wait a few minutes
before trying to use iPhone again.
261
Appendix A Support and Other Information