A user is having phone issues after installing a new application that claims to optimize performance. The user downloaded the application directly from the vendor's website and is now experiencing hig

Resetting the phone to factory settings is a drastic measure that would resolve the issue but should be a later step after attempts to remove the specific problematic application fail, as it causes data loss and significant re-configuration effort.

Increasing data plan limits does not solve the underlying security issue or the unauthorized network utilization; it only masks a symptom.

Disabling the mobile hotspot would prevent the phone from acting as an access point but would not stop the malicious application from using the phone's own network connection or performing other harmful activities.