Flash File ZTE Blade A31 Plus

Flash File ZTE Blade A31 Plus

The ZTE Blade A31 Plus uses a Unisoc/Spreadtrum (SPD) chipset, which means it flashes with the Unisoc ResearchDownload / SPD Upgrade Tool and a .pac firmware file — not QFIL or SP Flash Tool.

When you need this

Flash the stock ROM when the phone is bootlooping, stuck on the logo, or dead after an update. For a forgotten lock screen only, use a hard reset.

Before you start

  • Back up your data — flashing erases everything.
  • Install the Unisoc/SPD USB drivers (guide).
  • Download the .pac ROM that matches the A31 Plus model and region.

How to flash with ResearchDownload

  • Open ResearchDownload and use Load Packet to select the .pac file.
  • Click Start Downloading, then connect the powered-off phone (hold Volume Down).
  • Wait for the green “PASSED” bar, then boot.

Common problems

  • Not detected: install the SPD driver and try another USB port.
  • “Verify fail”: the .pac doesn’t match this exact model/region.

FAQ

Can I use SP Flash Tool instead?

No — SP Flash Tool is for MediaTek. The Blade A31 Plus is Unisoc, so use the Unisoc tool.

muralikrishna

Murali Krishna is the founder and lead editor of ResetFree.com. Since 2019 he has written hands-on guides on factory resets, screen unlocking, firmware (flash file) installation, backups, and device troubleshooting, testing each method across a wide range of Android phones, tablets, keypad phones, and routers. He started ResetFree to give everyday device owners clear, safe, step-by-step instructions for fixing and recovering the devices they own. He emphasizes backing up first and only servicing devices you own.

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