Samsung E100, E330, E700, E710, E715, E800, E820, S500, X100, X450, X460, X600, X640, x900, x910 cell phones

full pinout. should also work with V205, D418, E608, E715, EYX, P408, S307, S308, V206, X308, X426, X427

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

There are two numbering schemes - with pins counted from left to right and with pins counted from right to left (phone is keypad up).
Pins other than Tx,Rx,Vext,Gnd may be vary in different models.

Pin left-to-right numbering	Pin right-to-left numbering	Signal	Description
1,2	18,17	V_EXT_CHARGE	charge input
3	16	AUX_SPK	handsfree speaker out
4	15	TXD1	serial 2 out for debugging purposes
5	14	+Vbat	accumulator out
6,8,11	8,11,13	GND
7	12	REC01	power on/off scheme input
9	10	RXD1	serial 2 in for debugging purposes
10	9	AUX_MIC	handsfree mic in
12	7	CHARGER_OK	power on/off and charging control
13	6	JIG_REC	power on/off scheme control
14	5	CTS	serial 1 CTS
15	4	RTS	serial 1 RTS
16	3	RxD	serial 1 in used for data/ flash cable (shorted by R=22k to pin 18 in cable)
17	2	TxD	serial 1 out used for data/ flash cable (shorted by R=22k to pin 18 in cable)
18	1	+Vbat	accumulator out

Official cables are: SGH-E820, SGH-E100, SGH-E330, SGH-X100, SGH-X600, SGH-E700, SGH-E630 - PCB133NSEC/STD
SGH-X460 - PCB133LBEC/STD
SGH-S500 - PCB133LBE
SGH-E800 - PCB133LBEG/STD

18 pin Samsung right-to-left numbering cellphone special connector at the cellular phone (keyboard up)

Source:www.pinouts.ru