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 slightly different in different models.
Pin left-to-right numbering
Following pinout connections suggested for Samsung A200, A400, N200, N500, N600, N620, N700, N710, R200, R210, R220, T100, T400, T410, T500, T700, C120, C200, C210, C230, D100, D410, D415, D418, E100, E105, E300, E310, E315, E316, E317, E318, E330, E335, E400, E418, E600, E610, E630, E700, E710, E715, E800, E820, E850, P100, P107, Q200, S200, S300, S500, V100, V200, V205, V206, V208, X100, X105, X120, X138, X140, X150, X200, X400, X426, X427, X430, X450, X460, X475, X480, X488, X600, X610, X620, X636, X640 cable (needed for flashing?):
R=22kOhm.
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