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To unlock the MTM800 Enhanced after powering on, enter 
the code at the prompt. The MTM800 Enhanced enters the 
Home display.
If you fail to enter the correct code, the following message will 
be displayed:
Incorrect Code Entered
 — You are prompted to try again. 
After failing, your MTM800 Enhanced will be blocked. Please 
check with your Service Provider how many failed attempts 
are allowed.
How to unblock the MTM800 Enhanced
The display shows Unit Blocked
. You can send an 
Emergency Call.
To unblock the MTM800 Enhanced, enter the PUK (Personal 
Unblocking Key). The PUK is an eight-digit master code to be 
obtained from your Service Provider.
After entering the PUK successfully, you will be prompted to 
replace the forgotten code.
At the New Code? prompt enter the new 4-digit code, and 
repeat the code to confirm. If the code does not match, you 
will be prompted to enter it again until the new code message 
is accepted.
Change Code
From the main menu, select > Security > Change Code.
At the Old Code? prompt, enter the 4-digit code. If the old 
code does not match the entered code at verification, the 
display prompts you to re-enter the old code.
If the entered code matches the old code, the display 
prompts you to enter a new 4-digit code and to repeat it for 
confirmation. If the confirmation code does not match the 
new code, the display prompts you to re-enter the new code.
When the new code is accepted, the display returns to the 
Security sub-menu.
The default PIN code is 0000.