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A comment on “Just turn it off” and Airplane Mode. Parent comment

Re:“Just turn it off” and Airplane Mode by falcolas on Sunday June 18, 2023 @09:26PM (#36386284)
iPhones do communicate with others over Bluetooth; they explicitly warn you of this when turning your phone off.

As a side note, confirming no connections with cell towers is not “fairly easy to verify”, it requires a fair bit of semi-specialized gear.

[ Parent | on HN ]
Re:“Just turn it off” and Airplane Mode by upon_drumhead on Sunday June 18, 2023 @10:33PM (#36386698)
I have never seen this warning. What does it say? Do you have a screenshot or link about it?
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Re:“Just turn it off” and Airplane Mode by duskwuff on Sunday June 18, 2023 @10:51PM (#36386815)
When you power a newer iPhone off, there's a small message under the "slide to power off" switch, with the text:

> iPhone Findable After Power Off

Tapping it displays a dialog box with a longer message:

> iPhone Remains Findable After Power Off

> Find my helps you locate this iPhone when it is lost or stolen, even after power off

> The location is visible in Find My on your other devices and to people in Family Sharing you share location with.

> You can temporarily turn off Find My network and it will resume when this iPhone is turned on again.

with buttons "OK" and "Temporarily Turn Off Finding".

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Re:“Just turn it off” and Airplane Mode by falcolas on Monday June 19, 2023 @09:00AM (#36390566)
https://www.apple.com/icloud/find-my/

“You can even find devices that are offline or powered off.“

There’s some technical details there. The key words are “Find My Network”

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Re:“Just turn it off” and Airplane Mode by duskwuff on Sunday June 18, 2023 @11:00PM (#36386862)
> As a side note, confirming no connections with cell towers is not “fairly easy to verify”

It's fairly easy by comparison with more detailed questions about cellular traffic like "is this bit of specific data being sent to a cell tower". It does require some RF test equipment and the know-how to use it, but no specialized knowledge beyond that -- in other words, the sort of thing a company selling a RF-blocking device should have access to.

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