Hello technicians. This guide shows the working Samsung Galaxy A18 SM-A185F SM-A185F ISP Pinout. Using the ISP Pinout, you can restore stock firmware, bypass FRP lock, remove demo mode, and repair a dead boot directly with Flash64, UFI Box, Easy JTAG, or Medusa Pro.
If you work as a microsoldering technician and deal with bricked, network-locked, or dead phones, you can communicate directly with the UFS chip using an ISP connection. This method can be useful even when the phone is not fully booting but still responds to service modes. The Samsung Galaxy A18 SM-A185F supports MediaTek Dimensity 9500 devices, with BROM and preloader mode options available for supported devices that still respond.
What is ISP (In-System Programming)?
With ISP, technicians can work directly on UFS memory chips that are still soldered to the motherboard. Instead of taking out the chip, you connect jumper wires to correct ISP test points on the board. Depending on the device and service tool this can be used for programming firmware, boot repair, reading and writing storage and for certain tasks related to locking without removing the chip.
ISP Pinout is useful when:
- The device is completely dead and not detected on the PC
- You need to remove FRP, user data, or Samsung account locks
- The stock ROM needs a direct restore through a UFS box
- The device is stuck in a boot loop after a bad flash
- Partition read, write, backup or repair is needed before risky work
Samsung Galaxy A18 SM-A185F UFS ISP Pinout Image:
Remove the back cover and motherboard shield to access the UFS chip area. Clean board and ISP test points very carefully with IPA to remove dust, flux or other residue. Before making any connections check the pinout image of ISP against actual motherboard and make sure that test points are correctly identified.
UFS ISP Pin Labels You Need:
| Pin | Function |
| RST | Reset line for the UFS chip |
| TXOP / TXON | Transmit differential pair — data out of the chip |
| RXOP / RXON | Receive differential pair — data into the chip |
| GND | Ground reference for the ISP connection |
Required Tools for ISP Pinout
- UFS Box — UFI Box, Easy JTAG Plus, or Medusa Pro
- Soldering iron with a fine tip and flux
- Enamel-coated copper wire (30 AWG or thinner)
- Tweezers and IPA (isopropyl alcohol) for cleaning
- USB data cable and a Windows PC with box drivers
Samsung Galaxy A18 SM-A185F Key Specifications
| Device | Samsung Galaxy A18 |
| Model | SM-A185F |
| Network | 4G LTE model |
| Chipset | MediaTek Helio G99 (reported) |
| Service Work | ISP access, storage reading, backup, firmware and FRP service on supported hardware |
| Storage Interface | Confirm the installed eMMC/UFS memory on the motherboard before wiring |
| Connection | ISP box, USB service mode, or Samsung-specific mode as applicable |
| Model Warning | Use this guide only for SM-A185F and verify the board revision |
How to Connect Samsung Galaxy A18 SM-A185F ISP to the UFS Box
- Remove the battery first to prevent voltage conflicts.
- Clean the board area with isopropyl alcohol.
- Solder jumper wires to the RST, TXOP, TXON, RXOP, and RXON points.
- Connect the wires to your UFS/EMMC tool according to the pinout.
- Check all wires with a multimeter for shorts.
- Connect the device to UFI or Flash64.
- Open the software and select Identify UFS/EMMC.
- First Read/backup persist.
- Check the UFI’s Special Task / FRP operation.
If the connection is right, you will see the UFS chip info appear in the tool window.
Frequently Asked Questions
The model covered in this guide is Samsung Galaxy A18 SM-A185F. Check the sticker and board marking before starting ISP work.
Public device listings report a MediaTek Helio G99 platform for the SM-A185F family. Confirm the chipset on the board before selecting files or service modes.
No. Do not transfer this layout to another model code or board revision without comparing the motherboard and test-point locations.
A compatible UFS or eMMC box such as UFI Box, Easy JTAG Plus, Flash64, or Medusa Pro may be used when its software supports the installed memory and wiring method.
Confirm the SM-A185F model, board revision, memory type, pin labels, ground point, voltage requirements, and service-box wiring. Check for shorts before powering the board.
ISP can help with supported storage and repair operations, but FRP service depends on the exact firmware, security state, memory type, and authorized tool function.
