Universal Cell Phone 3-pole (mono) headset connector pinout
Motorola A840 , C650 , E1 , E398 , i335 , i425 , ic902 , MOTO Q 9c , MOTO Q 9m , V360 , V361 , V365 headset pinout
MRLG 4-pole 2.5mm headset connector pinout
Motorola was an American multinational telecommunications company founded in 1928. Motorola designed and sold wireless network equipment such as cellular transmission base stations and signal amplifiers. Motorola's home and broadcast network products included set-top boxes, digital video recorders, and network equipment used to enable video broadcasting, computer telephony, and high-definition television.