Avoid downloading apps for features your device is already capable of

Some users may download something like a QR code scanner or camera app without realizing their smartphone has these apps and features pre-installed. While some of these other apps may be safe, a lot of them can be a front for malicious software. Installing them may lead to your data being stolen or a loss in functionality for your device. If you notice any of these suspicious-looking applications installed on your device, delete them immediately.