for data/flash cable only
| Pin | Signal | Description |
| 4 | Vcc | USB +5V for SPH-A660 (and may be others) |
| 3 | Rx | USB Data- for SPH-A660 (and may be others) |
| 2 | Tx | USB Data+ for SPH-A660 (and may be others) |
| 1 | Gnd |
Alternative:
| Pin | Signal | Description |
|---|---|---|
| 2 | Rx | |
| 3 | Tx | |
| 1 | GND |
