This is completely dependant on your carrier. I do know for a fact Verizon Wireless (if that's your carrier) does NOT allow this to be changed. Contact your carrier to find out.
Acrillix - Samsung Community Valued Contributor Elite Member Be sure to click "✓ Accept as Solution" when you find an answer that works for you and "This Helped Me" if it's helpful. My Blog - Guru of the Galaxies: http://guruofthegalaxies.com/