📱 How to Flash SPD (Spreadtrum / Unisoc) Phone
ℹ️ Here is a simple and complete guide to flash an SPD (Spreadtrum / Unisoc) phone. This method works for most SPD 7731, 9832, 9863, 9850, and 6531 keypad & Android phones.
🔧 Requirements
- 💻 Windows PC (Windows 7 / 8 / 10 / 11)
- 🔌 Original USB cable
- 📂 SPD firmware file
- 📱 .PAC (Android phones)
- ☎️ .P5 / .SCAT / .BIN (Keypad phones)
- 🛠 SPD Flash Tool (Research Download Tool – recommended)
- ⚙️ Spreadtrum USB Driver installed
- 🔋 Phone battery charged (minimum 40%)
📥 Step 1: Install SPD USB Drivers
- ⬇️ Extract SPD USB Driver
- ▶️ Run DriverSetup.exe
- 🔄 Restart your PC
⚠️ Driver installation is required, otherwise the phone will not connect.
🛠 Step 2: Open SPD Flash Tool
- 🖥 Run ResearchDownload.exe as Administrator
- ⚙️ Click Load Packet (gear icon)
- 📁 Select your firmware .PAC file
- ⏳ Wait until the firmware loads completely
⚙️ Step 3: Tool Settings (Important)
- ⚙️ Click Settings
- ✅ Enable Erase All Flash (recommended for dead or hang logo)
- ❌ Do NOT enable Format unless needed
- ✔️ Click OK
📲 Step 4: Flash the Phone
- ▶️ Click Start Download
- 🔴 Power OFF the phone
- 🔘 Connect the phone to PC while holding Volume Down or Volume Up
- ☎️ For keypad phones, hold 0, *, or #
- 📊 Tool will detect the phone automatically
- 🚀 Flashing process will start
⏳ Step 5: Wait & Finish
- ⏱ Flashing time: 5–10 minutes
- ✔️ When you see Passed (Green)
- 🔌 Disconnect the phone
- 🔘 Power ON the phone
⏳ First boot may take 5–10 minutes.
❗ Common Problems & Fix
❌ Phone not detected
- 🔄 Reinstall SPD drivers
- 🔌 Change USB port (use USB 2.0)
- 🔘 Try a different key combination
❌ Fail at 0% / 1%
- 📂 Wrong firmware selected
- ✅ Enable Erase All Flash
- 🛠 Try an older Research Download Tool
❌ Dead boot after flash
- 🔁 Flash again with correct firmware
- ❌ Do NOT format unless instructed
🧠 Tips
- 🎯 Always flash exact model firmware
- 🚫 Do not disconnect cable during flashing
- 💾 Backup userdata if phone is working
🔥 Tools Used
- 🛠 Research Download Tool
- 🔁 Upgrade Download Tool (alternative)
- ⚡ Factory Download Tool (advanced users)
📱 How to Flash SPD (Spreadtrum / Unisoc) Phone
🔧 This guide explains how to flash an SPD (Spreadtrum / Unisoc) Android or keypad phone using the Research Download Tool.
📦 Requirements
- 💻 Windows PC (Windows 7 / 8 / 10 / 11)
- 🔌 Original USB cable
- 📂 SPD firmware file (.PAC / .P5 / .BIN)
- 🛠 Research Download Tool
- ⚙️ SPD USB Drivers installed
- 🔋 Phone battery charged (minimum 40%)
🧩 Step 1: Install SPD USB Drivers
⬇️ Extract the SPD USB Driver package and run DriverSetup.exe. Restart your computer after installation.
🖥 Step 2: Open SPD Flash Tool
- ▶️ Run ResearchDownload.exe as Administrator
- ⚙️ Click Load Packet (gear icon)
- 📁 Select your firmware .PAC file
- ⏳ Wait until the firmware is fully loaded
⚙️ Step 3: Tool Settings
✅ Click Settings and enable Erase All Flash (recommended for dead or stuck logo phones). Avoid Format unless required.
📲 Step 4: Flash the Phone
- 🚀 Click Start Download
- 🔴 Power off the phone
- 🔘 Connect the phone to PC while holding Volume Down or Volume Up
- ☎️ For keypad phones, hold 0, * or #
- 📊 Flashing will start automatically
✅ Step 5: Finish
✔️ Wait until you see Passed in green color. Disconnect the phone and power it on. First boot may take several minutes.
❌ Common Errors & Fix
- ⚠️ Phone not detected: Reinstall drivers or change USB port
- ⛔ Fail at 0%: Use correct firmware and enable Erase All Flash
- 💀 Dead after flash: Flash again with correct firmware
📌 Important Notes
- 🧠 Always flash exact model firmware
- 🚫 Do not disconnect cable during flashing
- 💾 Backup data if the phone is working
How to Flash SPD (Spreadtrum / Unisoc) Phone
This guide explains how to flash an SPD (Spreadtrum / Unisoc) Android or keypad phone using the Research Download Tool.
Requirements
- Windows PC (Windows 7 / 8 / 10 / 11)
- Original USB cable
- SPD firmware file (.PAC / .P5 / .BIN)
- Research Download Tool
- SPD USB Drivers installed
- Phone battery charged (minimum 40%)
Step 1: Install SPD USB Drivers
Extract the SPD USB Driver package and run DriverSetup.exe. After installation, restart your computer.
Step 2: Open SPD Flash Tool
- Run ResearchDownload.exe as Administrator
- Click on the Load Packet (gear icon)
- Select your firmware .PAC file
- Wait until the firmware is fully loaded
Step 3: Tool Settings
Click on Settings and enable Erase All Flash (recommended for dead or stuck logo phones). Do not use Format unless required.
Step 4: Flash the Phone
- Click Start Download
- Power off the phone
- Connect the phone to PC while holding Volume Down or Volume Up
- For keypad phones, hold 0, * or #
- Flashing will start automatically
Step 5: Finish
Wait until you see Passed in green color. Disconnect the phone and power it on. The first boot may take several minutes.
Common Errors & Fix
- Phone not detected: Reinstall drivers or try another USB port
- Fail at 0%: Use correct firmware and enable Erase All Flash
- Dead after flash: Flash again with correct firmware
Important Notes
- Always flash exact model firmware
- Do not disconnect cable during flashing
- Backup data if the phone is working
