Samsung SGH-i900 - Manual (Page 89)

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Troubleshooting
If you have trouble with your device, try
these procedures before you contact a
service professional.
When you turn on your device, the
following messages may appear:
Message
Try this to solve the
problem:
The SIM
card is
missing.
Ensure that the SIM card is
installed correctly.
Enter PIN.
When using the device for
the first time or when the
PIN requirement feature is
enabled, you must enter
the PIN supplied with the
SIM card. To disable the
PIN requirement feature,
tap Start → Settings →
Personal tab → Phone →
Security tab, and then
clear the Require PIN
when phone is used
check box.
Message
Try this to solve the
problem: