Apple iOS (for iPhones, iPads etc) has a reputation for security and privacy – that is why I use their devices and why I recommend them to clients. I know there are issues, with the App store commissions (but at least the apps are curated, a security plus), anti-privacy actions Apple takes (most can be mitigated, but on the other hand I do give up some privacy for functionality) and the fact I own a device that Apple controls (I can’t say anything to justify that!).
I still like the security functions. But there is erosion in the ecosystem…
Bruce Schneier has an article about spoofing an iPhone reboot with links to how this could be exploited.
Faking an iPhone Reboot – Schneier on Security
Your takeaway from this is always be aware how your device is working and if in doubt, get some help.
Here is a slide from one of Cybersecurity Master Classes – it is aimed at PC use but it can easily apply to other devices:
Clive Catton MSc (Cyber Security) – by-line and other articles