In this article, we’ll show you Realme C75x 4G (RMX5020) EMMC ISP Pinout that allows you to write DUMP file, Chip re-programming, or flash firmware or remove frp lock, bypass FRP, remove locks, and flash the stock firmware using any EMMC repair tool.
Also read: Realme GT Master Edition 5G RMX3363 EDL Test Point
What is EMMC ISP Pinout?
The ISP (In-System Programming) allows flash chip to be programmed without removing it from the PCB. It uses a specific pinout and protocol to communicate with computer.
A test point is a copper points on a PCB that allows you to boot the phone into the emergency download mode to perform flashing, unlocking or repairing the phone.
Read more: Realme C67 5G RMX3890 EMMC ISP PinOUT
Realme C75x 4G (RMX5020) EMMC ISP PinOUT Diagram Image:
The Realme C75x 4G ISP and Test Point enables you to carefully boot into Flash Mode. So, follow the below methods to successfully boot to Realme C75x 4G ISP Mode.
Also read: How to Enter Download or EDL Mode on Oppo Phone

More: QPST Tool – Qualcomm QPST Flash Tool Download Latest All Version
UFS ISP Pin Labels You Need:
- CMD – Command Line
- CLK – Clock
- DAT0 – Data line 0
- VCC / VCCQ – Power supply for EMMC
- GND – Ground
Tip: You can use a microscope or a 10x magnifier to identify the points correctly.
Do read: Realme C75 RMX3941 Test Point
Required Tools for ISP Pinout Method
Make sure your workstation includes:
- UFI Box, Easy JTAG Plus, or Medusa Pro
- 0.1mm – 0.3mm jumper wires
- Fine-tip soldering iron
- Soldering flux
- Isopropyl Alcohol (IPA 99%)
- Multimeter
- Microscope or magnifier
Also read: Realme OTA Downgrade File
How to Connect ISP to UFS or EMMC Box
- Open the back panel of the Realme C75x 4G.
- Disassemble the phone.
- Locate the eMMC chip area on the PCB.
- Find & Solder to ISP Points
- Use the above diagram to identify these pins: CLK, TXON, TXOP, GND, and RXON, RXOP.
- Realme C75x 4G (RMX5020) ISP PinOUT to Hard Reset, FRP Bypass or Flash firmware.

Read more: Honor 9N LLD-AL20, LLD-AL30 Test Point
- Or, you can use the test points.
- Connect to UFI or Easy JTAG,
- In the UFI or Easy Jtag Software:
- Click Identify UFS
- Bypass FRP: Navigate to: User Partition – Special Task – Reset FRP
- Fix Dead Boot: Select the firmware & click flash.
- That’s it.
Also: Realme C71 RMX5303 SPD Test Point
Warning: Incorrectly shorting test points can damage the Realme C75x 4G. Proceed with caution!

