三星C100，C110，P500的，P510手机电路图/Samsung C100, C110, P

full pinout. should work also with A300, A388, A400 18 pin Samsung right-to-left numbering cellphone special connector  at the mobile phone (keyboard up) Full C100 pinout :
There are two numbering schemes - with pins counted from left to right and with pins counted from right to left (phone is keypad up). Pin
right-to-left
numbering Pin
left-to-right
numbering Description118+VBATT (4.2V) (accumalator voltage)217RS232_TXD316RS232_RXD415Debug_RX514Debug_TX613TA_Det712RS232_CTS811GND Ground910RS232_RTS109Data_Cable_Detection118GND Ground127Handsfree speaker (+)136Handsfree MIC (+)145VBATT (4.2V)154RS232_DTR163DA I_Reset172DCVOLT (CHG+) charger input181DCVOLT (CHG+) charger input

Pins 1, 14, 15; pins 8,10,11 (counted from right to left) should be shorted in cable.

18 pin Samsung cellphone special connector  at the mobile phone (keyboard up)

Source:www.pinouts.ru