The Nokia 105 (RM-908) is a classic feature phone known for its durability and long battery life. Unlike modern smartphones, this model does not support data transfer over USB by default. Instead, the micro-USB port is primarily designed for charging only. However, understanding its pinout is essential for advanced troubleshooting, emergency flashing, or creating a custom jig.
To define the USB interface pinout for the Nokia 105 (RM-908) for the purposes of:
The Nokia 105 RM-908 uses a simple "dumb" platform. The USB connection points are located on the PCB (Printed Circuit Board).
To use the USB pinout on the Nokia 105 (RM-908), you cannot use a standard USB cable. You need specific hardware:
A: If you short D+ and D- together or apply 5V to them, the phone can enter “test mode” – but no user data is accessible. It’s a diagnostic state only. Nokia 105 Rm 908 Usb Pinout
The connection points are located on the main motherboard. You must identify the test points to solder or press probes against the board.
Standard Interface:
Pinout Diagram Details:
| Pin Name | Function | Description | | :--- | :--- | :--- | | V+ (VBUS) | USB Power | +5V Input (Red Wire) | | D- | Data Minus | Data Negative (White Wire) | | D+ | Data Plus | Data Positive (Green Wire) | | GND | Ground | Ground/Earthing (Black Wire) | | GND | Ground | Secondary Ground point | The Nokia 105 (RM-908) is a classic feature
(Note: On the RM-908 PCB, these are usually gold-colored contact pads labeled accordingly or arranged in a vertical row. Locate the GND point first to orient the others.)
A: No. Most modern cables leave pin 4 floating. You need a cable with pin 4 tied to ground, or use the original Nokia charger (which internally shorts ID to GND).
While the Nokia 105 RM-908 does not support mass storage, you can still recover contacts and SMS via FBUS (Fast Bus) protocol using the USB pins. This requires:
Locate test points near the UEM (power management + USB controller): To use the USB pinout on the Nokia
Connection for data readout:
| Phone test point | USB-TTL Adapter | |-----------------|-----------------| | TP-51 (RX) | TX (3.3V) | | TP-52 (TX) | RX (3.3V) | | GND (any ground) | GND |
Power the phone from its own battery. Use a terminal program (115200 baud, 8N1). At power-on, you’ll see diagnostic output. Using proprietary AT commands, you can dump phonebook via AT+CPBR=?.