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Home >> GMC >> 2019 >> Terrain SL >> Repair and Diagnosis >> External Pages >> Different car >> Section 125 (Cellular System, Entertainment System, And Navigation System - Description And Operation) >> Description And Operation >> OnStar Description And Operation (UE1 With IOU/IOT/IOR) >> Mobile Identification Number and Mobile Directory Number

Mobile Identification Number and Mobile Directory Number

WARNING: This page is about a different car, the 2018 GMC Terrain and 2018 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.

The telematics communication interface control module utilizes 2 numbers for cellular device identification, call routing and connection, a mobile identification number and a mobile directory number. The mobile identification number represents the number used by the cellular carrier for call routing purposes while the mobile directory number represents the number dialed to reach the cellular device.

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