For those of you trying to find out the pinout of A968 by Chang Yang Electronics, the pinout is:
Front connector view, metalic part up, plastic part down:
20 GND
19 GND
18 GND
17 MIC IN
16 L PHONE OUT
15 R PHONE OUT
14
13
12
11
10
09 DATA+ GREEN
08 DATA- WHITE
07
06
05
04 VCC
03 VCC
02 VCC
01 VCC
Inside the phone, the PCB for pins 01-04 and 18-20 are soldered as one, that is, the connector does not "close" any circuit, it's just for a matter of current (mA).
Phone cable [as usual, shield is (-), but not in this case, it carries the (+)]:
SHIELD: +L +R
BLUE: GND
RED: MIC