How to change MCN In this article iPhone To set MCN on iPhone Dial **5005*7672*+18763805199#SEND Android Launch SMS Application. Tap on Menu and go to settings. Scroll down and select Message/Service Center Number. Set it to +18763805199 and Tap on OK. Related articles How to get your PUK code Voicemail FAQ's Converting from Prepaid to Postpaid What is a Recycled Number? Troubleshooting network signal issues