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The 2.5mm 4-Pole Plug to 3.5mm Stereo Socket Smartphone Headphone Adaptor from Maplin is not compatible with the OpenMoko 4-pole 2.5mm jack. --Nimpo 14:57, 1 May 2009 (UTC)

Anyone has an idea if this is working? Sadly it has a cable between it, the mono version is a compact one. Here is circuit layout. --Quix0r 14:34, 5 May 2009 (UTC)

I want to wire audio-out pins of the 2.5 jack to go to AUX input in my car, and continue using FreeRunner's built-in microphone, but I am concerned with the echo that might appear if built-in microphone will (and it definitely will) pickup the "incoming" audio from car's speakers. Have someone tried this setup? Do FreeRunner have some kind of echo-cancellation? --Skliarie 13:34, 15 Nov 2009 (UTC)

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