Headset splitter cable

As previously reported the definition of the article is false, it is a headset splitter, as indicated by symbol on the sockets by cons attention to the wiring!
I tested on a Samsung Note II, a ultrabook with a single input / output combining line in and line out and a IPhone 5C; the mic input only works on any devices to the headphone output is OK. So I measured with a multimeter and here is the wiring on the plug:
1. Tip: Left audio
2. Ring 1: Right audio
3. Ring 2: mass !!!!
4. Body, Chassis: Micro

I tried to disassemble the plug to redo welding with the microphone 3, but the plug is molded, so I have cut and put a new sheet.

Conclusion I bought this product to avoid making welds and save time but I am now obliged.