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The Nokia 105 RM-908 uses a standard Micro-USB 2.0 Type B female port. However, Nokia occasionally implemented non-standard resistor dividers on the ID and D+/D- lines to detect the charger type (standard vs. fast charging).
| Pin No. | Signal Name | Function | Wire Color (Typical) | | :--- | :--- | :--- | :--- | | 1 | VBUS | +5V Power | Red | | 2 | D- | Data Negative | White | | 3 | D+ | Data Positive | Green | | 4 | ID | Host/Slave detect (On-The-Go) | None/Unused | | 5 | GND | Ground | Black |
In most feature phones, only pins 1 (VBUS) and 5 (GND) are required for charging. Pins 2 and 3 are needed for data synchronization (PC suite). Nokia 105 Rm 908 Usb Pinout
A: Check the 10kΩ resistor between pin 4 (ID) and ground. It may be damaged. Also verify the charging IC (usually a small 6-pin IC near the USB port) is getting VBUS.
| Symptom | Possible Cause | |---------|----------------| | No charging | Damaged Pin 1 or 5 on the phone’s port; broken PCB trace; faulty micro-USB socket. | | Phone shows “USB Connected” | D+/D- lines are shorted to GND or VBUS – should not happen unless port is dirty or damaged. | | Overheating while charging | Incorrect charger wiring or short between VBUS and GND. | The Nokia 105 RM-908 uses a standard Micro-USB 2
The phone has two separate physical interfaces:
| Connector | Type | Purpose | |-----------|------|---------| | Bottom center | Nokia 2mm DC barrel jack (round) | Charging only (5V DC) | | Inside, under battery | 6-pin test point array | USB data (factory / flashing) | A: Check the 10kΩ resistor between pin 4 (ID) and ground
There is no micro-USB or mini-USB port on the outside for data sync.
If you’ve flashed a corrupt firmware (e.g., via Infinity Box or MX Key), the phone may be dead. You need to enter emergency download mode using the USB pinout plus a hardware test point.
| Pin | Signal | Function | Wire Color (typical) | |-----|--------|----------|----------------------| | 1 | VBUS | +5V Charging Power | Red | | 2 | D- | Data Minus (unused in this model) | White | | 3 | D+ | Data Plus (unused in this model) | Green | | 4 | ID | For OTG (not supported) / sometimes used for charging mode detection | None (or tied to GND via resistor) | | 5 | GND | Ground | Black |
