What a trusted device is
A trusted device is a computer, tablet or other phone where you're already signed in, which your account can use to confirm it's really you. Almost nobody has tried it until the day they need it.
- What it is
- A second already-signed-in device
- Since
- 2015 (Apple)
- Verdict
- Yes
What it is
Apple defines a trusted device as an iPhone, iPad, Apple Watch, Apple Vision Pro or Mac where you've already signed in with two-factor authentication. Google has a similar idea with its own trusted devices, which can skip the second step of verification. In both cases, it's a device that has already proven it's you, and that can be used to confirm your identity somewhere else — by showing a sign-in code, or receiving a push alert you approve.
When it was introduced
Apple formalized it in 2015 as part of its new two-factor authentication, with iOS 9 and OS X El Capitan: any Mac or iOS device that's signed in automatically becomes a trusted device. Google has expanded an equivalent approach within its two-step verification as it added what's known as Google Prompt.
Why it's used
It's faster and more secure than typing a code: the provider trusts a device it already knows is yours. For anyone with a laptop, tablet, or old phone still signed in, it's a safety net that already exists without anyone configuring it on purpose.
The problem is that, because it requires no action to activate, it's also the easiest to ignore: many people only have one signed-in device, which is exactly the phone they could lose. Having a second trusted device — even an old laptop — is the difference between having a way out and not having one. And it's worth testing before you need it: a laptop that's been off for a year might ask for updates or a password you no longer remember.
Should you use it?
Yes, keep at least one that isn't your phone. A laptop or tablet that's already signed in costs nothing and could be the only door left open to you.
Check this
- Do you have a computer or tablet already signed in to your main account?
- Do you know whether that device still turns on and connects to the internet?
- Is it the only trusted device you have besides your phone?
Official sources: Apple: trusted devices and phone numbers · Google help: two-step verification