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Some people sometimes just want to test some new applications that they think will make it easier to search. and some foreign applications are sometimes installed themselves because of advertisements from other applications such as in-game applications, tool applications or social media that embed advertisements in them.
Some new app testers are indeed very vulnerable because we also don't know how safe the app is, even users also register their devices to be able to receive Beta Tester apps that are still not even released to the public and only those who register can get the app. This will indeed invite higher risks, if the device is the main device used to install wallets and some other important applications.
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As an option to avoid such troubles, the use of Linux systems again arises. As far as I know, these two software programs apply to Android and Windows. Although, of course, phone users need to be very careful with the installation of different programs. Since, according to the data, even the Play Market cannot guarantee the safety of users by allowing masquerading programs into their service.
The use of Linux Operating system is not popular among beginners, only those who understand how to operate Linux are interested in using it.
Even in smartphones that are quite vulnerable, Android, and iOS users' cases are still quite rare, but there is also a possibility of being infected if there is another update for the iOS OS.
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It's not enough to keep your crypto holdings in a separate device, which is a good step, but we still use our mobile for certain things, some use it to open the forum and one cannot access bank applications without internet connection, so the risk still presents itself.
I only use one phone and it is also used to install my personal wallet (but not my main wallet). I am now more selective and do not install strange applications, only common and trusted applications that I install. Always monitoring and scanning applications would be better, so that no suspicious applications are installed on the smartphone I use.