Samsung SM-C105AZWAATT - Manual (Page 86)

Using the Service Dialing Numbers
You can view the list of Service Dialing Numbers (SDN)
assigned by your service provider. These numbers may
include emergency numbers, customer service numbers, and
directory inquiries.
1. From the Home screen, tap Contacts ➔ ➔
Settings.
2. Tap Service numbers.
3. Scroll through the available numbers (if available).
4. Tap a number and the call is made.
Note: This menu is available only when your SIM card
supports Service Dialing Numbers.
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