96
Troubleshooting
I forgot my 
password
. 
See “Changing Your Unlock Code” on 
page 78.
I pressed the End/
Power key, but 
nothing 
happened.
 
To either turn your phone On or Off:
Press and Hold   for two seconds. If 
your phone is still not turned on, check 
your phone’s battery is charged. 
The Display says
 
Insert SIM card or 
Check SIM Card
 even 
though I have 
inserted my SIM 
card in the phone.
 
The SIM card may be incorrectly inserted. 
Check the SIM card to make sure that it is 
inserted properly. 
The display says 
SIM Blocked
. How 
do I unblock my 
SIM card?
 
Call your service provider to obtain the 
PIN unblocking code.
The display says 
Enter Unlock code
. 
How do I unlock 
my phone?
 
Enter the default unlock code, 1234, or 
the last 4 digits of your phone number. If 
you changed the default unlock code in 
your phone, please enter the unlock code 
that you defined to unlock it. 
My phone asks for 
an unlock code 
when I try to open 
a feature.
 
The application you want is locked. If you 
own the phone but do not know the unlock 
code, see “Changing Your Unlock Code” 
on page 78.
Problem Solution
C155_Florida(U.S.).book  Page 96  Friday, December 31, 2004  10:44 AM