I was listening to a radio program about ransomware and they said that Android is less secure than iPhone (iOS). And then I saw this old article: https://www.the-parallax.com/2016/02/16/parallax-primer-why-are-androids-less-secure-than-iphones/ Note the HTC. And then I started thinking about your old phone. If you continue to use that HTC you have, you may be vulnerable. Seems like Samsung is slightly better, 'tho not perfect.