Mobile Identification Number and Mobile Directory Number

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2002 GMC Yukon XL, 2002 GMC Yukon, 2002 Chevrolet Tahoe, 2002 Chevrolet Suburban, and 2002 Cadillac Escalade EXT. However, it is still accessible from the selected car via links, so may be relevant.

Directives by the Federal Communication Commission (FCC) have mandated that cellular devices manufactured after November 2002 must have a capability that allows customers to transfer their assigned phone numbers to any new cellular devises purchased in the future. Devises which fall into this category no longer have a single "phone number" but two numbers which identify that device, a MIN (Mobile Identification Number) and a MDN (Mobile Directory Number). The MIN represents the number used by the cellular carrier for call routing purposes while the MDN represents the number dialed to reach the cellular devise. Because of these FCC directives, some OnStar systems may not recite the correct phone number when the user requests the "My Number" feature of OPC. This situation is considered normal for any OnStar system that exhibits the condition. Customers using OPC can contact the OnStar Call Center and ask an advisor what their correct number is at any time. Although technicians have the capability to change these numbers by means of the scan tool, this should ONLY be done at the direction of and with explicit instruction from the General Motors Technical Assistance Center (GM TAC).

Dialing a Phone Number Hands Free

Caller Action	OnStar® System Response
IMPORTANT: If you make a mistake with a number or the OnStar® system misunderstands you, say "clear". This will erase the last number said.
Press the Call/Answer button	"Ready"
Dial	"Number please"
Say each number clearly, pausing until the system confirms receipt of the number.	The system will repeat the number stated. If the number was not heard or understood, the system will state the word "number" prompting the user to repeat the last number.
Dial	"Dialing" or "Dialing" plus the phone number given.