Description
The Qualcomm SM6125, marketed as the Snapdragon 665, is a popular mid-range platform used across many Realme, Xiaomi, and other Android devices. Phones on this chipset commonly need ISP intervention when they get stuck in a bootloop, fail to boot after a bad flash, or lock behind FRP after a reset. ISP pinout access connects a programmer directly to the flash storage via test pads, bypassing the CPU boot chain and any locked software.
Qualcomm SM6125 ISP Pinout Review
The four ISP points for the SM6125 are TX ON, TX OP, RX ON, RX OP. These serial transmit and receive lines link your programmer to the storage controller. TX ON and TX OP form the transmit pair; RX ON and RX OP form the receive pair. On the SM6125 board, the pads sit near the flash chip and are unmarked, requiring a verified diagram. This chipset is very common in ISP repair, so reference diagrams are widely available, but always confirm pad positions against your specific board revision. Verify each of the four points with a multimeter before connecting to the programmer.
How To Find ISP Pinout SM6125
Disassemble the phone — back cover off, battery disconnected, motherboard removed and flipped. Locate the flash storage chip near the center of the board, often under a shield can. Using a loupe or microscope, find the four pads for TX ON, TX OP, RX ON, and RX OP. The SM6125 appears in many phone models, so match the diagram to your specific device using landmark components for orientation. Confirm continuity on each pad, then solder fine wires or use a pogo-pin adapter.
How To Reset FRP Unlock With Dril CPU
Connect the four ISP points and power the board through the programmer only. Open your Dril CPU tool and select the Qualcomm SM6125 / Snapdragon 665 profile. Once the storage controller is detected, go to the FRP erase function and delete the FRP partition to remove the Google lock. Confirm and run the operation. After completion, disconnect the wires, reconnect the battery, and boot the device. It should pass the FRP screen. If detection fails, check for a TX/RX swap and verify the ground point.
Final Words
The Qualcomm SM6125 ISP pinout is a reliable and well-documented FRP reset method for the popular Snapdragon 665 platform. Accurate identification of TX ON, TX OP, RX ON, RX OP and a solid programmer connection ensure success. Work under ESD protection, keep the battery disconnected, and verify each pad before powering on.
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