# There is a bluetooth ghost in my room!
**URL:** https://boards.straightdope.com/t/there-is-a-bluetooth-ghost-in-my-room/701728
**Category:** Factual Questions
**Created:** [October 18, 2014, 6:26pm UTC](https://boards.straightdope.com/t/there-is-a-bluetooth-ghost-in-my-room/701728 "2014-10-18T18:26:23Z")
**Posts on this page:** 9
**Page:** 1
### Author:  [@Artemis\_Tardis](https://boards.straightdope.com/u/Artemis_Tardis)
#### Post date: [October 18, 2014, 6:26pm UTC](https://boards.straightdope.com/t/there-is-a-bluetooth-ghost-in-my-room/701728/1 "2014-10-18T18:26:23Z")
I just updated my macbook pro to Yosemite. It looks gorgeous, yeah. But… I opened the bluetooth settings and… there is a device near by me that I didn’t use for at least 4 years. This means that it could not possibly be on - I never even used it on this computer. How the hell then is my computer finding this device? [http://i.imgur.com/HyIvC7l.png](http://i.imgur.com/HyIvC7l.png) This computer never had contact with s Knight before!
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### Author:  [@Reply](https://boards.straightdope.com/u/Reply)
#### Post date: [October 18, 2014, 6:35pm UTC](https://boards.straightdope.com/t/there-is-a-bluetooth-ghost-in-my-room/701728/2 "2014-10-18T18:35:48Z")
Can it be saved from an older computer into the apple cloud? does apple do that?
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### Author:  [@eschereal](https://boards.straightdope.com/u/eschereal)
#### Post date: [October 18, 2014, 6:37pm UTC](https://boards.straightdope.com/t/there-is-a-bluetooth-ghost-in-my-room/701728/3 "2014-10-18T18:37:21Z")
Probably found a reference to it in one of your phone’s settings-files.
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### Author:  [@Artemis\_Tardis](https://boards.straightdope.com/u/Artemis_Tardis)
#### Post date: [October 18, 2014, 6:41pm UTC](https://boards.straightdope.com/t/there-is-a-bluetooth-ghost-in-my-room/701728/4 "2014-10-18T18:41:09Z")
Nope, I didn’t had apple products when I had this device. It never found this device before. My old phones are all turned off.
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### Author:  [@beowulff](https://boards.straightdope.com/u/beowulff)
#### Post date: [October 18, 2014, 7:09pm UTC](https://boards.straightdope.com/t/there-is-a-bluetooth-ghost-in-my-room/701728/5 "2014-10-18T19:09:53Z")
It isn’t finding it - it’s just a preference file that tells the computer what devices you have connected to in the past. Just delete it.
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### Author:  [@kayaker](https://boards.straightdope.com/u/kayaker)
#### Post date: [October 18, 2014, 7:53pm UTC](https://boards.straightdope.com/t/there-is-a-bluetooth-ghost-in-my-room/701728/6 "2014-10-18T19:53:34Z")
When I first got an Android phone, I had a few situations where Google on my iPad knew things I had done on my phone. Like an iPad search auto completing to what I had earlier searched for on my phone. It was convenient, but a bit freaky. Now I expect that sort of thing.
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### Author:  [@Artemis\_Tardis](https://boards.straightdope.com/u/Artemis_Tardis)
#### Post date: [October 18, 2014, 9:15pm UTC](https://boards.straightdope.com/t/there-is-a-bluetooth-ghost-in-my-room/701728/7 "2014-10-18T21:15:33Z")
Ok. I found my emergency phone inside my bag. I bring it with me turned off in case of an emergency. Somehow the phone was on. With bluetooth activated.
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### Author:  [@njtt](https://boards.straightdope.com/u/njtt)
#### Post date: [October 19, 2014, 12:50am UTC](https://boards.straightdope.com/t/there-is-a-bluetooth-ghost-in-my-room/701728/8 "2014-10-19T00:50:24Z")
I think you have to expect these sorts of backward temporal loops to crop up occasionally when you have (or are) a Tardis.
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### Author:  [@Digital\_is\_the\_new\_Analog](https://boards.straightdope.com/u/Digital_is_the_new_Analog)
#### Post date: [October 19, 2014, 1:12am UTC](https://boards.straightdope.com/t/there-is-a-bluetooth-ghost-in-my-room/701728/9 "2014-10-19T01:12:35Z")
> [@njtt](#):
>
> I think you have to expect these sorts of backward temporal loops to crop up occasionally when you have (or are) a Tardis.
So, Bluetooth is timey wimey?