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PO
 

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  1. PO
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    <p>Currently I have the same problem as you. I've developed an application to exchange messages between BT terminals and I'm testing it on different phones ( I have S3, S2, S plus, Nexus One and Galaxy Y) to analize the behaviour. Phones have this specs:</p> <ul> <li>Samsung S2 : Custom ROM (Android v4.2.1) - Rooted</li> <li>Samsung S3 : Stock ROM (Android v4.1.2)</li> <li>Samsung S+ : Custom ROM (Android v4.1.2) - Rooted</li> <li>Samsung GY : Custom ROM (Android v2.3.6) - Rooted</li> <li>Nexus One : Stock ROM (Android v2.3.6) - Rooted</li> </ul> <p>As far i can tell you from my experience, S2 and S3 after some time start to show the pairing dialog even if they are already paired and exchanging data. This happens all the time I include one of this two phones in my testbed, others are working fine and never ask for pairing ( expecially Nexus One that has a flawless behaviour).</p> <p>I have made long running tests (from 4 to 6 hours) and I still can't figure out why this phones ask for pairing sometimes after 3 hours.. sometimes after 10 minutes.</p> <p>The only thing that i would like to point you out is that even if u are using insecure connection you could still be asked for human interaction for pairing. Give a look at that (taken from <a href="http://en.wikipedia.org/wiki/Bluetooth" rel="nofollow">http://en.wikipedia.org/wiki/Bluetooth</a>) :</p> <blockquote> <p>Just works: As implied by the name, this method just works. No user interaction is required; however, <strong>a device may prompt</strong> the user to confirm the pairing process. This method is typically used by headsets with very limited IO capabilities, and is more secure than the fixed PIN mechanism which is typically used for legacy pairing by this set of limited devices. This method provides no man in the middle (MITM) protection.</p> </blockquote>
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    1. POWhen does android show a pairing dialog when using insecure RFCOMM bluetooth sockets?
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    1. USVittorio Cozzolino
    1. USVittorio Cozzolino
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    1. COThanks. Certain Android 4.x versions are said to have a bug that will trigger such a dialog if the other device doesn't have the appropriate service running/listening - see [this report](http://code.google.com/p/android/issues/detail?id=40101). You may want to check if your listener is staying active.
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      1. USJan Schejbal
    2. COThanks for the information but yes, my service is always running :). Maybe I found where the problem lies, now I'm working on it. I'll update my post if my solution works.
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      1. USVittorio Cozzolino
 

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