Optus X Pro (ZTE P650) Firmware Flash File Download [Stock Rom]
The Optus X Pro (model ZTE P650) is a budget-friendly 4G smartphone offered by the Australian carrier Optus. It provides essential smartphone features for everyday use. If your device is stuck in a bootloop, experiencing severe software lag, or you need to restore it to its factory condition, flashing the official stock firmware is the definitive solution.
Important Note: This device is powered by a UNISOC SC9863A chipset. The flashing process is different from Qualcomm or MediaTek devices and requires the SPD (Spreadtrum) Upgrade Tool and a firmware file with a .pac extension. This firmware will restore the device to its original Optus Australia software, including the network lock and all pre-installed apps.
Quick Device Specs
- Device: Optus X Pro (ZTE P650)
- Release year: 2020
- Chipset: UNISOC SC9863A
- Display: 6.52″ HD+ IPS LCD
- Battery: 4000 mAh (Non-removable)
- Memory: 3GB RAM + 32GB storage
- Camera: 16MP + 2MP dual rear, 5MP front
- Original OS: Android 10
- Carrier: Optus (Australia)
Required Downloads
| File / Tool | Download Link |
|---|---|
| SPD Upgrade Tool | Download Tool |
| SPD/UNISOC USB Drivers | Download Drivers |
Stock ROM & Firmware
| Version | Build Number | Android | Carrier | Download | Size |
|---|---|---|---|---|---|
| V1.0.0B11 | Z6351OV1.0.0B11 | 10 | Optus (Australia) | Download | ~1.4 GB |
How to Flash Using SPD Upgrade Tool
- Install Drivers: Download and extract the SPD USB Drivers. Run the DPInst.exe (for 64-bit) or DPInstx86.exe (for 32-bit) to install the necessary drivers on your computer.
- Extract Firmware and Tool: Unzip the downloaded Firmware file (…SPD.zip). You will find a single large file with a .pac extension. Also, unzip the SPD Upgrade Tool folder.
- Launch the Tool: Open the SPD Upgrade Tool folder and double-click UpgradeDownload.exe to run the application.
- Load the Firmware: Click on the first gear icon (Load Packet). Navigate to the folder where you extracted the firmware and select the .pac file. The tool will take a few moments to load it.
- Prepare the Phone: Power off your Optus X Pro completely.
- Start Flashing: Click the “Play” icon (Start Downloading) in the tool. Now, press and hold the Volume Down button on your phone and connect it to the computer via USB cable. The tool will detect the phone and the flashing process will begin. You can release the volume button once the progress bar starts moving.
- Wait for Completion: Do not disconnect the device. The process is complete when the progress bar fills up and displays a green “Passed” message.
- Reboot: The phone may reboot automatically. If not, disconnect it and hold the Power button to turn it on. The first boot can take up to 10 minutes.
FAQs
Q1. What is a .pac firmware file?
A .pac file is a compressed firmware package used for devices with UNISOC (formerly Spreadtrum) chipsets. It contains all the phone’s software partitions (like system, boot, recovery, etc.) in one single file, which is then flashed using the SPD Upgrade Tool.
Q2. Will this firmware remove the Optus SIM lock?
No. This is the official software from Optus. Flashing this firmware will restore the phone to its factory condition, which includes the original network lock. The device will only function with an Optus SIM card in Australia.
Q3. The SPD Upgrade Tool isn’t detecting my phone. What’s wrong?
This is typically a driver issue. Ensure the SPD drivers are installed correctly. Also, confirm the phone is completely off before you hold the Volume Down button and connect the USB cable. Trying a different USB port or cable can also solve the problem.
Q4. What does the “Checking Baudrate” error mean?
If the tool gets stuck on “Checking Baudrate,” it means it has failed to establish a stable connection with the phone’s chipset. This is caused by incorrect drivers, a bad USB cable, or not pressing the boot key (Volume Down) correctly when connecting the device.
Troubleshooting (Optus X Pro)
- “Invalid SIM” or No Signal: This is expected if you are using a non-Optus SIM card. The phone is carrier-locked to Optus Australia.
- Flashing Fails or Stops Midway: This can be caused by a loose USB connection or an issue with the .pac file. Ensure you are using a high-quality USB cable and that the firmware file was downloaded completely without corruption.
- Optus Pre-installed Apps Crashing: After a fresh install, some carrier apps might be outdated. Connect the phone to Wi-Fi, go to the Google Play Store, and check for updates for all installed applications.
- Slow Performance: The UNISOC SC9863A is an entry-level chipset. For the best possible performance, restart your phone after setup and disable any pre-installed Optus apps that you do not use via the phone’s settings (Settings > Apps).
