Samsung Galaxy S25 Ultra S938B/U ISP UFS Pinout – Complete Guide for Technicians

If you’re working on data recovery, EMMC/UFS programming, or unbricking the Samsung Galaxy S25 Ultra (SM-S938B/U), this complete ISP UFS Pinout guide will help you get started safely. This tested pinout layout allows you to connect the device directly to your UFS socket or EasyJTAG/UFI Box without removing the UFS chip, saving time and reducing the risk of board damage.

What Is an ISP UFS Pinout?

ISP (In-System Programming) pinout refers to specific test points on the motherboard that connect directly to the UFS memory chip. These points allow professional technicians to read, write, or repair firmware data without performing chip-off procedures.
Using the correct Samsung Galaxy S25 Ultra UFS Pinout, you can perform:

• Full firmware backup or restore

• Data recovery from dead or locked devices

• FRP unlock or KG lock removal

• Repair of bootloop or partition corruption issues

Why Use the Tested S25 Ultra Pinout

This tested pinout file helps you avoid guesswork. You get clear, high-resolution images of the exact test points labeled for TX, RX, CLK, VCC, VCCQ, and GND connections. Whether you use EasyJTAG Plus, UFI Box, or Flash64 Programmer, the pinout ensures precise wiring and minimizes the chance of board damage.

Key Benefits:

• 100% verified and working on S25 Ultra S938B/U board

• Supports UFS programming for firmware read/write

• Saves time during FRP unlock and boot repair

• Ideal for both professional repair labs and training institutes

How to Use the ISP UFS Pinout

1. Remove the back cover and locate the motherboard.

2. Identify test points as shown in the included image.

3. Solder thin jumper wires from test points to your UFS adapter.

4. Connect the adapter to EasyJTAG/UFI and select the model.

5. Power the board externally and perform the required operation (read/write/erase).

⚠️ Caution: Always ensure correct voltage (1.8V/2.8V) and ground connection. Wrong wiring can permanently damage the UFS IC.

Expert Tip:

If you face read errors in EasyJTAG, try adjusting the VCC voltage or use a shorter jumper wire. Always clean the test points with IPA before soldering for stable contact.

Conclusion

The Samsung Galaxy S25 Ultra S938B/U ISP UFS Pinout is essential for advanced Android repair, FRP unlocking, and data restoration. Download the complete file now from MobiFirms.com, follow the guide carefully, and perform safe, efficient repairs.

👉 Download the complete tested ISP UFS Pinout file below and start fixing your Galaxy S25 Ultra like a pro!