Popup on my phone

That popup is fake. iPhones don’t randomly detect “Trojan horses” and then tell you to download a cleaner app. It’s just a scare page trying to get you to install something sketchy. Don’t download anything from it, just close the tab and clear your Safari history and website data.

As long as your iPhone 14 is updated and you didn’t install anything, you’re fine. You can also check Settings for any unknown profiles. If you want extra reassurance, you could run something like Certo AntiSpy to scan for anything suspicious, but those popups are just scams.

gammyfromms wrote:

I got a Popup on my iPhone 14, fully updated. Message states I’ve been infected with a Trojan horse.

It's a scam.

Tells me I need to download a phone cleaner app. What do I do?

Avoid that app like the plague!

Likewise, if you see similar messages with phone numbers to call, do not call the phone numbers, as the numbers will connect you directly to scammer criminals posing as "tech support" or "security" people.

it's just spam scam internet browser popups

read

Block pop-up ads and windows in Safari - Apple Support

I am sure this pop-up has come up with a third-party app installed on your device or in Safari while browsing.

Keep the iPhone updated to the latest iOS always and never Jailbreak. That's it.

iOS / iPadOS devices cannot be infected with Viruses / Malware / Spyware *** unless you have intentionally downloaded spurious software or unauthorized apps directly from the internet and installed them on your device, and/or have Jailbroken. 

It (Hacking) also depends on how careful you are in sharing sensitive and valuable information pertaining to your iPhone such as Passcode, Password, etc with your friends and family members.

Be judicious when sharing the device's sensitive and valuable information with friends and family members.

**The primary reason for this is Sandboxing. All third-party apps are “sandboxed”, so they are restricted from accessing files stored by other apps or from making changes to the device. Sandboxing is designed to prevent apps from gathering or modifying information stored by other apps.

Security of runtime process in iOS and iPadOS - Apple Support

The sandbox on an iPhone is a security feature that creates a restricted environment for each app to run in isolation from other apps and the operating system. It is a core component of iOS's security architecture and plays a crucial role in making iPhones more secure.

App Store really should lock out developers who use these advertising contacts but, hey, it's a free market.

You bought a premium phone that cannot be infected by malware except by installing malware from App Store!