OnStar has expanded to 4G LTE with a strong signal strength and different vehicle Wi-Fi capabilities. Whenever your vehicle is on, your hotspot is immediately able to be access and ready for connection to your device(s). The Wi-Fi hotspot can support up to 7 different mobile devices at once. Unfortunately, this feature is only available to select Model Year vehicles. These vehicles include the 2015 Chevrolet, Buick, GMC, and Cadillac. With the stronger signal with OnStar, you now have a more reliable and faster connection. This feature was released back in June of this year, but so far has positive reviews. All you need is a mobile device which has access to 4G connectivity, and you’re set!
Article Source: https://www.onstar.com/us/en/4glte/