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Just a theory but perhaps it's so that a bluetooth keyboard or assistive device can be used after an update to complete setup.
 
It is just to promote AirDrop.



If somebody is updating from iOS 6, Apple wants to enable AirDrop by default so they can discover the feature.



If you are already on iOS 7, it doesn't have a check for the version so it will still enable it after each update.


It does it on devices without AirDrop though. And there is nearly as many devices without AirDrop then there is with it. iPad 2, iPad 3, iPhone 4, iPhone 4S
 
So the NSA are within 10 metres of you?

By time Snowden gets done dumping his trove, we'll learn the NSA is within 8 or 10 feet of us 24/7 if we're in our house and on the grid...

On topic, I don't like that BT defaults to on. I don't think WiFi defaults to on in iOS devices after upgrades, or at least mine don't. But I think my laptops do, after an OS upgrade. That annoys me too!

Are people so stupid they cannot take a moment to read the "quick start" directions on a little piece of paper in the box? Leave the darn settings off and let people learn how their devices work. God, in another ten years we'll be down the queue from chipmunks.

If I want to make a connection, I'll make it. Otherwise I like my stuff to sit there and play dumb. Knowing that it's possible that cell-capable devices may make some connections anyway could make me nuts if I let it, but I'm too old to worry about the state of American spycraft. I don't even have enough time left to watch all the spy movies from the Cold War era, so why worry about whether I'm starring in a 21st century one right now.. :p
 
Just a theory but perhaps it's so that a bluetooth keyboard or assistive device can be used after an update to complete setup.

Just a thought, but would it not be for people who use hearing aids as they use Bluetooth to connect to phones etc for audio purposes

Good thinking. It all makes sense but the question is not so much as "why they activate BT after every update" but rather "why they 'override' my BT settings after ever update".

They don't do it for any other settings (thankfully), so why should they do it for BT?

(At least, the WiFi could be used as a way to connect you to the Internet so your device can properly be updated)
 
That's suspicious, and above all a big problem for all of us. Thank you for finally bringing up such a disaster.

Class action?
 
here is the real reason ... according to Greg Sterling, a senior analyst for Opus Research ... you guys were close with airdrop though!

http://news.yahoo.com/why-apple-keeps-enabling-bluetooth-every-time-ios-155515825.html


spoiler alert: it's because of iBeacon


I've seen this repeated confidently in a few places and it's nonsense. They've been doing this for years, certainly for a long long time before Ibeacons (or airdrop) existed or were even thought of.

My best guess is that it's to do with something low level - maybe the update process itself wipes the setting somehow (something to do with how the baseband layer works) so the update doesn't know whether you had it on or not beforehand, and they just assume you did as the safer bet in case you needed it for something.
 
Oddly I don't recall it happening with iOS 4, 5, or 6 updates, but I definitely recall it with various/all iOS 7 updates.
 
Oddly I don't recall it happening with iOS 4, 5, or 6 updates, but I definitely recall it with various/all iOS 7 updates.


It's possible it wasn't as consistent with every update but it definitely happened, I can remember puzzling over it on older phones including the the 3GS, although I forget which IOS versions exactly.
 
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