If your Samsung Galaxy A26 5G (A266M) is unresponsive, stuck in a boot loop, or FRP-locked with no method available for Fastboot or Recovery Mode, this guide aims to help with chip-level repair. This guide shows you the EMMC ISP pinout for the Samsung Galaxy A26 5G, It directs communication with the internal storage of the device via tools like UFI, Easy JTAG, or Medusa. With this ISP pinout, you can perform firmware dumping, FRP bypass, boot repair, and data recovery.
In this post, I’ll walk you through the ISP PinOUT for the Samsung A266M, what tools you’ll need, connection tips, and common fixes—all based on hands-on experience.
⚙️ What is ISP (In-System Programming)?
In simple terms, an ISP allows you to access the EMMC chip without having to remove it. You simply have to identify the appropriate pinout of the board, and you have to utilize a supported EMMC tool such as UFI, Easy JTAG, or Medusa Pro to attach it directly.
Isp Pinout is useful when:
- Phone is dead (black screen, no boot, no charging)
- FRP is locked, and you can’t use ADB, fastboot, or OTG bypass
- You need to dump firmware from a working unit to repair a dead one
- You’re working on a boot repair or partition restore
- Phone is detected as “unknown” in PC (EDL not working)
Samsung Galaxy A26 5G (A266M) ISP EMMC Pinout Image:
Here’s where things get technical. The Samsung Galaxy A26 5G SM-A266M shares a hardware layout with several BBK models, but the actual pin locations can vary slightly. You’ll find the ISP points near the EMMC chip under the metal shield.
💡 Tip: Use a microscope or a 10x magnifier to identify the points correctly. Don’t rely on diagrams alone—confirm the layout visually.
When repairing dead boot problems, especially for devices like the Samsung Galaxy A26 5G (A266M), the Easy JTAG Plus and UFI Box dongles are great for mobile repair. They are important for scenarios where the phone has been incorrectly flashed and does not display the startup logo, and is no longer responding to power.
Required Tools for ISP Pinout:
- Make sure your bench is set up with the right tools before jumping in:
- UFI Box, Easy JTAG, or Medusa Pro
- 0.1mm – 0.3mm jumper wire
- Fine tip soldering iron
- Isopropyl Cleaner (IPA 99%)
- Soldering flux
- Multimeter (for checking continuity)
How to Connect ISP to EMMC Box
- First, take your phone’s back cover off. Then, remove the battery, fingerprint reader, and camera from the motherboard.
- Unscrew the screws that hold the motherboard in place, carefully remove it, and put it in a safe place.
- Find the TxOp, TxOn, RxOp, and RxOn pins for the eMMC on the device. You might have to cut through the steel cover to get to them.
- Get the UFI box, then take the adapter out of it. The pins on the adapter should be the same as the ones listed in the last step.
- Between the base and the adapter, use jumpers to connect the four pins (TxOp, TxOn, RxOp, and RxOn). Leave the USB to power the VCC and VCCQ.
- Put the connector into the UFI box and connect the box to your computer.
- Connect the battery to the computer again. Then, connect the phone to your computer using the USB connection.
✅ If you have the right connection, you will see EMMC chip information in the tool window.
