Are u talking about changing your contact?. On ZipWhip app- tap on new text looks like the area is greyed out..tap in the box and enter the phone number and send text. Refer to FAQ 17. Can I edit my contact's mobile number? No, a contact's mobile number is associated with a Thread ID. To modify a contact's number, a new contact card must be created.If you need more help with Zipwhip contact https://sprint.zipwhip.com/ .