I use this for my Cingular/AT&T; 8525. One nice thing about this adapter is that it doesn't block any of the adjacent thing on that side of my 8525, so this is useful if you need to get at the soft reset pin hole, the IR port, or the microphone while your headset adapter is plugged in.After 3 months of use with headphones this adapter developed a broken or lose wire internally and was no longer usable.