Hello mobile technicians, in this guide we will show you the working image of the Vivo Y31D 4G UFS ISP Pinout (PD2533F). With the ISP Pinout you can restore the stock ROM, bypass the FRP lock, remove MDM Lock, fix a Dead Boot or wipe user data directly using Flash64, UFI Box or Easy JTAG.
If you handle bricked, network-locked, or PC-dead gadgets as a microsoldering specialist, the ISP connection lets you talk straight to the UFS chip without pulling it off the board. Below we share the tested Vivo Y31D PD2533F ISP pinout, what each label means, and how to wire it to your UFS programming box.
What is ISP (In-System Programming)?
ISP lets you reach the UFS/EMMC chip without desoldering it. You match the correct pinout on the board and attach a supported tool such as Flash64, UFI, Easy JTAG, or Medusa Pro.
ISP pinout is useful when:
- The phone is dead (black screen, no boot, no charging)
- FRP is locked and ADB, fastboot or OTG bypass is not working
- You need to dump firmware from a working unit
- You are doing a boot repair or partition restore
- The device shows “unknown” on PC and EDL is not working
Vivo Y31D 4G UFS ISP Pinout Image:
The ISP pinout is a “CPU drill” style solution because you need to touch the data lines that sit on the board layer. On the Vivo Y31D the test points sit near the UFS memory chip on the main motherboard. You may need to scratch the protective mask or lift a small part of the EMI shielding to see them.
UFS ISP Pin Labels You Need:
- Rst – Reset
- TXOP – Transmit Data Positive
- TXON – Transmit Data Negative
- RXOP – Receive Data Positive
- RXON – Receive Data Negative
- GND – Ground (connect to any ground point)
Required Tools for ISP Pinout
Set up your bench correctly before making any jumper connections.
- UFI Box, Easy JTAG, Flash64, or Medusa Pro
- 0.1mm – 0.3mm jumper wire
- Fine tip soldering iron
- Soldering flux
- Isopropyl alcohol (IPA 99%)
- Multimeter (continuity check)
Vivo Y31D 4G Key Specifications
| Model | Vivo Y31D 4G (PD2533F) |
| Chipset | Qualcomm Snapdragon 6s 4G Gen 2 |
| Storage | UFS – 256 GB |
| RAM | 8 GB |
| Display | 6.75-inch |
| Battery | 7200 mAh |
| Announced | January 2026 |
How to Connect Vivo Y31D 4G ISP to the UFS Box
- Remove the battery first – prevents voltage conflicts.
- Clean the board area with isopropyl alcohol.
- Solder jumper wires to Rst, TXOP, TXON, RXOP and RXON points.
- Connect the wires to your UFS/EMMC tool following its pinout.
- Double-check every wire with a multimeter for shorts.
- Connect to UFI or Easy JTAG.
- In the software select Identify UFS/EMMC.
- Use the operation you need: User Partition → Special Task → Reset FRP.
If the connection is right, you will see the UFS chip info appear in the tool window.
Common Issues and Fixes
- No chip detected – reflow the solder joints and check continuity on TXON/RXON.
- Wrong pin order – flip TXOP/TXON so the differential pair matches the tool.
- FRP not clearing – make sure you pick User Partition → Special Task → Reset FRP, not generic erase.
Frequently Asked Questions
The Vivo Y31D 4G uses the Qualcomm Snapdragon 6s 4G Gen 2 chipset with UFS storage.
The Vivo Y31D 4G uses UFS storage, so you need a UFS-capable ISP tool like Flash64, UFI, Easy JTAG or Medusa Pro.
This pinout covers the PD2533F board variant of the Vivo Y31D 4G.
Yes. Connect via ISP and use the User Partition → Special Task → Reset FRP option to clear the lock.
