The Advan I5C Duo is a 5-inch smartphone from 2018, notable for its dual rear camera setup at a budget price point. It is powered by a Spreadtrum SC9850 processor and runs on the Android 7.0 Nougat operating system. This guide provides the official stock firmware packages to fully restore your device’s software.
Crucial Information: For the same software version, the Advan I5C Duo has two different firmware formats. One version uses a .pac file and is flashed with the SPD Upgrade Tool, while the other uses a .cpb file and requires the YGDP Tool. If one firmware type and tool does not work for your device, the other one will.
⚠️ Disclaimer: Data Loss is Permanent
The flashing process will completely erase all data from your phone’s internal storage, including:
- Contacts and call logs
- Messages and chat history
- Photos, videos, and files
- Installed apps and settings
Please back up your data before proceeding. Once erased, your information cannot be recovered.
Quick Device Specs
- Device: Advan I5C Duo
- Release year: 2018
- Chipset: Spreadtrum SC9850
- Display: 5.0″ IPS LCD, 720 x 1280 pixels
- RAM/Storage: 2GB/16GB
- Battery: 2500 mAh
- Original OS: Android 7.0 (Nougat)
Required Downloads
You will need the flashing tool that corresponds to the firmware you choose to download. The USB drivers are the same for both methods and are essential for your computer to detect the phone.
- A firmware package from the table below
- YGDP Tool (for the .cpb file)
- SPD Upgrade Tool (for the .pac file)
- Spreadtrum/UNISOC SCI USB Drivers (required for both tools)
Official Stock Firmware (ROM)
Both firmware files are for the same software version. If one flashing method fails, please try the other.
| Build Date | Firmware Type | Required Tool | Download |
|---|---|---|---|
| 2018-02-27 | Stock ROM (.pac File) | SPD Upgrade Tool | Download |
| 2018-02-27 | Stock ROM (.cpb File) | YGDP Tool | Download |
How to Flash Stock Firmware
Follow the instructions for the type of firmware file you have downloaded.
Method 1: Flashing the PAC Firmware with SPD Upgrade Tool
This method is for the .pac file. Install the UNISOC drivers. Launch the SPD Upgrade Tool, click the gear icon to “Load Packet,” and select the .pac file. Click the play icon to “Start Downloading.” Power off your phone, then press and hold Volume Down while connecting it to your PC.
For a complete guide on this method, please refer to our pillar article: How to Flash Firmware with SPD Upgrade Tool.
Method 2: Flashing the CPB Firmware with YGDP Tool
This method is for the .cpb file. First, install the UNISOC drivers. Open the YGDP Tool, enter the password (e.g., ‘9527’), and load the .cpb firmware file via the “Config” menu. Click “Start,” power off your phone, then press and hold Volume Down while connecting it to your PC to begin.
For a complete guide on this method, please refer to our pillar article: How to Use YGDP Tool to Flash CPB Firmware.
Device-Specific Troubleshooting for Advan I5C Duo
- Which Firmware Should I Use?: Since both files are for the same software version, there’s no “better” one. It depends on how your specific device was originally programmed. We recommend trying the .pac file with the SPD Upgrade Tool first, as it is a more common method. If it fails, then proceed with the .cpb file and YGDP Tool.
- Fixing Camera Issues: The dual camera is a key feature of the I5C Duo. If your camera app is crashing, showing a black screen, or the dual-camera effects are not working, a full firmware re-flash is the best way to resolve software-related camera problems by restoring the original camera libraries and drivers.
- Drivers Are Essential: Both flashing tools rely on the same UNISOC SCI USB drivers. If your phone is not detected, the problem is almost certainly the drivers. Reinstall them and restart your PC.
- YGDP Tool Password: The YGDP flashing tool requires a password to log in. The most common default passwords are 9527 or 369.
FAQs
- Q1. Why are there two different file types for the same software version?
- This can happen when a manufacturer uses different software suppliers or flashing processes for different production batches of the same phone. Although the Android version is the same, the way it’s packaged for installation is different.
- Q2. My Advan I5C Duo is dead. Which file should I use to fix it?
- Start with the .pac file and SPD Upgrade Tool. If the tool fails to detect the phone or gives an error, then proceed to the .cpb file and YGDP Tool. One of them should work if the issue is software-related.
- Q3. Will this process remove the Google Account lock (FRP)?
- No. Flashing the stock firmware restores the OS but does not bypass Factory Reset Protection (FRP). After flashing, you will still be prompted to enter the login details of the last Google account synced to the phone.
- Q4. Will I lose my data?
- Yes, both flashing methods will completely erase the phone’s internal storage and restore it to its original factory state.
