Product: Mobile > Cell Phones > AT&T Cell Phones > SGH-I637
What Does the FDN (Fixed Dial Number) Feature Do On My SGH-I637 (Jack) Phone?
The FDN (Fixed Dial Number) mode, if enabled and supported by your SIM card, allows you to restrict your outgoing calls to the limited set of phone numbers that are included in the Fixed Dialing Number list.
To enable or disable FDN mode follow the steps below:
Note: Not all SIM cards have a PIN2 code. If your SIM card does not, this menu option is not displayed. You must obtain your PIN2 code from your service provider
For more information on the SGH-I637 (Jack) or click here.