After a user installs a mobile application from an advertisement, the phone's battery dies a few hours later, and it is hot to touch, even when not in use. Which of the following should a technician do first?

While checking for unauthorized device administrators can be important in identifying security breaches, it is not the first step in this scenario. The immediate symptoms of battery drain and overheating indicate a potential malware infection, making a malware scan a more relevant initial action to diagnose the issue accurately.

Contacting the software developer may provide insights into known issues with the application; however, this action does not directly address the urgent symptoms exhibited by the device. The priority should be to assess and mitigate any immediate threats to the device's functionality before seeking external support.

Ensuring appropriate Mobile Device Management (MDM) policies is vital for ongoing device security but does not address the immediate concern of a malfunctioning device. This step is more suited for long-term device management rather than an urgent response to current malfunctions caused by potential malware.