| Pin | Pin Name | Description | 
| 1 | MIC | Mic (+) | 
| 2 | AUDIO | Audio (+) | 
| 3 | GND | MIC (-) | 
| 4 | GND | Audio (-) | 
I had dificulties finding this pinout for making my own headset from a Nokia cellphone.
| Pin | Pin Name | Description | 
| 1 | MIC | Mic (+) | 
| 2 | AUDIO | Audio (+) | 
| 3 | GND | MIC (-) | 
| 4 | GND | Audio (-) | 
I had dificulties finding this pinout for making my own headset from a Nokia cellphone.