Samsung GALAXY MEGA User Manual page 208

Using Fixed Dialing Numbers
Enabling FDN
1. From the Home screen, tap
(My device tab)
My device
My device
Fixed dialing numbers.
2. Tap Turn on FDN.
3. At the prompt, enter your PIN2 code and tap OK.
FDN is enabled.
4. To enable FDN after it has been disabled, tap Turn off
FDN, enter your PIN2 code and tap OK.
Important! Not all SIM cards use a PIN2 code. If your SIM card
does not, this menu does not display.
The PIN2 code is provided by your carrier. Entering
an incorrect PIN2 code could cause the phone to
lock. Contact customer service for assistance.
202
(Apps) Settings
Call Additional settings
Changing the PIN2 Code
1. From the Home screen, tap
(My device tab)
My device
My device
Fixed dialing numbers.
2. Tap Change PIN2.
3. At the prompt, enter your old PIN2 code.
4. At the prompt, enter a new PIN2 code.
5. Confirm your PIN2 code.
(Apps) Settings
Call Additional settings