I am thinking of buying a basic Smart phone. Many Smart phones seem to have the Android operating system. I have seen older ones with Android 5 up to newer ones with Android 9. The older ones seem to have Android 5 or Android 6, these phones appear to be cheaper than the ones with Android 9, but are they less secure and more open to hacking in the same way that Windows XP is not as secure an operating as Windows 10 with computers?