Jabez needs to alert through an SMS text message those corporate users who have a specific brand and type of mobile device regarding a serious malware incident. What technology will she use?

Push notification services.

Explanation:

Push notification services can be used to deliver important messages on mobile devices in an efficient and timely manner. The different mobile platforms such as android, iOS have their services which makes it easy for Jabez to send the messages to users with a specific brand and type of mobile device. The messages will pop up on the mobile device of the user, whether the app or the website associated with notifications is running or not.