Is your Samsung A15 5G is stuck at boot logo, Reset FRP, Screen lock or repair OS using any UFS & EMMC repair tool. This guide, we will covered Samsung A15 5G SM-A156 UFS ISP pinout & Test Point to quickly fix the issue and repair the phone easily.
Also read: Samsung S21 FE SM-G990 UFS ISP PinOUT
What is ISP Pinout?
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: Samsung S20+ 5G SM-G986 EDL Test Point

Read more: Samsung A16 SM-A165F ISP Pinout
Samsung S21 FE SM-G990 UFS ISP PinOUT | Test Point Image:
Below, we provide ISP and Test Point Methods to carefully boot your device into Flash Mode. So, follow the below methods to successfully Reboot your Samsung A15 5G SM-A156 to 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:
- CLK
- TXOP
- TXON
- RXOP
- RXON
- GND – Ground
Tip: You can use a microscope or a 10x magnifier to identify the points correctly.
Also read: Samsung Galaxy A56 SM-A566B/E UFS ISP PinOUT
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: Samsung S25 Ultra SM-S938B/U UFS ISP PinOUT
How to Connect ISP to UFS Box
- Open the back panel of the Samsung A15 5G
- 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.
- Samsung A15 5G SM-A156 UFS ISP PinOUT to Hard Reset, FRP Bypass or Flash firmware.

Do read: Vivo Y39 5G UFS ISP Pinout
- 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: Samsung M13 SM-M135F/U EMMC ISP PinOUT
Warning: Incorrectly shorting test points can damage the Samsung A34. Proceed with caution!

