You can port out your Dingtone number to another carrier by conforming to the following procedures:
Step#1. Open Dingtone, tap “Connect”.
Step#2. Select the phone number you’re going to port out from your number list.
Step#3. Choose “Port Out This Number”.
Step#4. Tap “I Agree” and pay the port-out fee.
Step#5. Complete your payment to finish port-out request.
Step#6. Submit your port-in request to the phone company you are switching to.