Sony Ericsson that have tx-rx connection

Sony Ericsson that have tx-rx connection:

2218z,
A2618s, A2618sc, A2628s, A2628sc,
F500, F500i,
J200c, J200i, J300a, J300c, J300i,
K300a, K300c, K300i, K500c, K500i, K506c, K508i, K600, K608i, K700, K700c, K700i,
P800, P802, P900, P908, P910a, P910c, P910i,
R300d, R300LX, R300z, R310s, R310sc, R320s, R320sc, R380e, R380sc, R380s, R380WORLD, R520LX, R520m, R520mc,
S700c, S700i, S710a,
T200, T202, T20e, T20ec, T20s, T20sc, T238, T28s, T28sc, T28z, T28WORLD, T290a, T290c, T290i, T292a, T29s, T29sc, T300, T306, T310, T312, T316, T39m, T39mc, T60c, T60d, T608, T60LX, T610, T61c, T61d, T616, T618, T61LX, T61z, T628, T62u, T630, T637, T65, T68, T68i, T68ie,
V600i, V800,
Z1010, Z500a, Z502a, Z600, Z608, Z800i.

bottom Pin	Name	Direction	Description
1	ATMS		Audio to mobile
2	AFMS/RTS		Audio from mobile/RTS (connected to GND in cable?)
3	CTS/ONREQ		CTS/Mobile Station On REQuest (connected to GND in cable?)
4	data in		Data to mobile (Rx). (Tx for K300i)
5	data out		Data from mobile (Tx). (Rx for K300i)
6	ACC in		Accessory control to mobile. Used as Rx in some models (i.e. T68) for flashing.
7	ACC out		Accessory control from mobile/handsfree sense. Used as Tx in some models (i.e. T68) for flashing.
8	AGND		Audio signal ground + 0V reference
9	flash		Flash memory voltage + Service (shorted to pin 11 in service cable)
10	DGND		Digital ground
11	Vcc		DC + for battery charging + External accessory powering

Pinout by Cruiser team:

Pin	Signal	Description
1	ATMS
2	AFMS
3	CTS_ON
4	DTMS
5	DFMS
6	CTMS
7	CFMS
8	AGND
9	VPPFLASH
10	DGND
11	DCIO

CTMS stands for Control To Mobile Station; CFMS stands for Control From Mobile Station; DTMS stands for Data To Mobile Station; DFMS stands for Data From Mobile Station

Standard cable is Sony Ericsson DCU-11

 

The (Tx)&(Rx) are reverse for K300i model, you must connect CTS & DGND together on board and connect the common wire to CTS(Pin3) in phone connector. If your cable is working fine then dont change it.