Below is the standard pinout for the micro-USB connector used on the Nokia 105 (RM-908). This applies to the phone’s charging/data port wiring where the micro‑USB connector is exposed on the PCB.
Pin assignments (micro‑USB, looking into the plug with contacts up):
Notes and practical details:
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Nokia 105 (RM-908) uses a specific USB pinout on the motherboard to facilitate charging and data connections for flashing or repairing the device. Since this model typically features a micro-USB port, identifying the correct jumper points is essential for hardware-level fixes. USB Pinout and Charging Configuration
The following pinout configuration is standard for the RM-908 motherboard: VCC (5V+):
Found on a larger yellow pad, typically used for the primary charging input. Data+ (D+): Indicated by the connection point. Data- (D-): Indicated by the connection point. Ground (GND): on the circuit board for grounding the connection. Common Hardware Solutions
Repairing the Nokia 105 RM-908 often involves tracing these connections from the USB port area to their designated pads on the motherboard using red trace lines for visual guidance. Flashing and Unlocking:
Because the RM-908 lacks external storage or Bluetooth, firmware resets or unlocking often require a box flash interface or specific USB pinouts to communicate with repair tools like Infinity-Box Charging Issues: Nokia 105 Rm 908 Usb Pinout
If the device fails to charge, technicians use these pinouts to create "jumpers" (bypass wires) from the charging port to the VCC and GND pads. Security Reset: While the default security code is
Understanding the Nokia 105 RM-908 USB Pinout Nokia 105 (RM-908)
remains a classic for its durability, but even the toughest phones eventually need a hardware fix. Whether you’re dealing with a charging failure or need to recover data from the motherboard, knowing the specific USB pinout is essential for successful mobile repairing The Nokia 105 RM-908 Pinout Guide
The USB port on the Nokia 105 RM-908 facilitates both power delivery and data transfer. If the physical port is damaged, technicians often use "jumpers" to connect directly to the motherboard pads. Pin Number Positive charging voltage from the USB adapter. Data - (D-) Negative data line for communication. Data + (D+) Positive data line for communication. Typically used to identify the connected device. GND (Ground) Negative/Ground return for the circuit. Common Repair Solutions
If your device is failing to charge, consider these common fixes: Charging Jumper
: If the Micro-USB port pads are ripped off the PCB, you can solder a thin wire (jumper) from the charger's positive terminal directly to the on the motherboard. Data Recovery
: For phones that won't turn on but have a functional motherboard, connecting to the
lines is the only way to interface with the device software. Standard Reset Below is the standard pinout for the micro-USB
: Sometimes "hardware" issues are actually software glitches. The default security code for this model is Important Safety Tips Check Voltage : Use a multimeter to ensure you are receiving a stable before soldering. Avoid Overheating
: Feature phone boards are delicate; excessive heat during soldering can damage nearby components like the display connector or CPU. Battery Care : Do not leave the phone charging for more than to protect the battery's lifespan. For more advanced technical details, you can find full schematic diagrams on specialized technical forums. for this specific model? Nokia 105 Dual SIM User Guide - Microsoft
The Nokia 105 (RM-908) does not have a native Micro-USB port for data transfer or charging like newer models; it uses a proprietary 2.0 mm charging connector. To perform flashing or software repairs, you must use the FBUS test points located on the PCB behind the battery. RM-908 FBUS / USB Pinout Guide
When connecting the phone to a flashing box (like Infinity-Box or Advance Turbo Flasher) using a modified USB cable, follow this pin configuration: Pin 1 (VBAT): Battery Positive (+) Pin 2 (TX): Data Transmit Pin 3 (RX): Data Receive Pin 4 (MBUS): Combined data line Pin 5 (GND): Ground / Battery Negative (-) Draft Post: Nokia 105 (RM-908) Flashing & USB Pinout
Headline: 🛠️ Service Tip: Nokia 105 (RM-908) USB & FBUS Pinout for Flashing
Need to unlock or flash a classic Nokia 105 RM-908? Since this model lacks a standard USB port, you'll need to use the hidden test points on the PCB. Pinout Configuration: VCC / VBAT: Power Supply (+) TX: Transmit Data RX: Receive Data MBUS: Control Line GND: Ground (-) Pro Tips:
Code Reset: If the phone is locked, the default security code is usually 12345.
Hard Reset: You can often trigger a factory reset by entering *#7370# or *#7780# if the phone still boots. Notes and practical details:
Hardware Check: If you are dealing with a "Not Charging" issue, check the charging jumper ways near the 2.0 mm jack.
#Nokia105 #RM908 #MobileRepair #USB_Pinout #Flashing #GSMRepair #TechTips Nokia 105 user guide: Keys and parts - HMD
Looking at the micro-USB port on the phone’s motherboard (bottom view) :
To flash or service an RM-908 via USB (e.g., using Best Samsung, ATF, or MXKEY tools), you cannot rely on the standard USB port. Instead, technicians access test points on the PCB or use a USB-to-UART adapter connected to the phone’s internal Rx/Tx pads. The USB port itself plays no role in data transfer.
Q1: Can I charge a Nokia 105 RM-908 with just two wires (red and black from USB)? A: Yes, absolutely. The phone does not require data negotiation to begin charging. Simply connect +5V to VBUS and GND to GND.
Q2: My USB port is destroyed. Can I solder directly to the battery terminals? A: Technically yes, but do not do this. Batteries require a CC/CV charging algorithm. Bypassing the charging circuit can cause the battery to overheat, swell, or explode. Always solder to the test points (TP701/TP702) which are after the protection IC but before the battery management.
Q3: What is the maximum charging current via the USB pinout? A: The internal charger IC on the RM-908 is limited to 450-550 mA. Using a 2A charger will not damage the phone; the phone will only draw what it needs.
Q4: Can I use a Nokia CA-189 USB cable? A: The CA-189 is a charging-only cable (no data lines). It has a standard micro-USB pinout (only pins 1 and 5 connected). It will work perfectly for charging the RM-908.
To utilize the USB pinout, the following tools are required: