While reviewing a user's smartphone, you notice the device surpassed its monthly data allotment in less than 24 hours. In Settings > Mobile data usage, a recently installed flashlight application shows several gigabytes of background traffic even though the user never opened it. What should you do FIRST to address this security issue and stop the unexpected network activity?
Update the mobile OS to the latest available patch level.
Enable battery saver mode to restrict background processes.
Uninstall the flashlight application from the device.
Perform a network settings reset and reconnect to the carrier.
The abnormal background traffic strongly suggests the flashlight app is malicious or collecting data without authorization. Removing the offending software immediately stops its network access, preventing further data leakage or charges. Battery-saver modes can limit some background activity but will not eliminate a malicious program. Resetting network settings will reconnect the device but leaves the rogue app intact. Updating the OS is good practice but will not directly halt an application that is already installed and actively transmitting data.
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Why is uninstalling the flashlight app the best first step?
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How can you identify if an app is malicious?
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What other security measures should be taken after removing a malicious app?