| Pin | Signal | Description |
| 18 | USB +5V | Connect to PC USB pin 1 in USB data cable |
| 17 | USB D- | Connect to PC USB pin 2 in USB data cable |
| 16 | USB D+ | Connect to PC USB pin 3 in USB data cable |
| 12 | phone RX (PC TX) | serial |
| 11 | phone TX (PC RX) | serial |
| 1,2 | GND | Connect to PC USB pin 4 in USB data cable |
Pins 2,7 shorted and connected to +5V supply in serial (flash) cable.
Headset pinout by /0lympy (not tested!)
| Pin | Signal | Description |
| 3 | EARMIC_P | Headphone mic |
| 4 | EARMIC_N | |
| 5 | EARSPK_R | Headphone speakers |
| 6 | EARSPK_COM | |
| 7 | EARSPK_L | |
| 13,14 | VBAT | Phone inner battery + |
| 19,20 | V_EXT_CHARGE | External charger + |
