This page provides the official download links for all available stock ROM versions for the Celkon Ufeel 4G. The Ufeel 4G was an entry-level smartphone that offered a front-mounted fingerprint sensor, a notable feature for its price point in 2017. If your phone’s fingerprint sensor has stopped working, it’s stuck in a bootloop, or has been infected with malware, flashing the stock firmware is the ultimate solution. This package contains the original Android 7.0 Nougat software in a .pac file format, designed for installation with the SPD Upgrade Tool on its Spreadtrum chipset.
Reinstalling the firmware will perform a complete wipe, removing all data, screen locks, and viruses. It is the most effective method to unbrick a Celkon Ufeel 4G and restore it to a clean, factory state. Please read the note under the download table for guidance on which of the many provided versions to choose.
User Data and Security Advisory for the Celkon Ufeel 4G – Issued: 4:30 AM, Wednesday, September 17, 2025.
Immediate Local Notice: This flashing process will permanently erase all your personal data (photos, contacts, etc.) from your Celkon Ufeel 4G. A full backup is essential. As of today, Android 7.0 Nougat is critically outdated and has numerous unpatched security vulnerabilities. Using this device for any sensitive online activity is not secure and is strongly discouraged. This firmware is intended to restore basic functionality only.
Celkon Ufeel 4G: Quick Device Specifications
Please confirm these details match your device to ensure you are using the correct firmware file.
- Device Model:
- Celkon Ufeel 4G
- Release Date:
- 2017
- Chipset:
- Spreadtrum SC9832 (Quad-core 1.3 GHz)
- Display:
- 5.0 inches, 720 x 1280 pixels (HD)
- Battery:
- 2500 mAh
- RAM/Storage:
- 1GB RAM / 8GB Internal Storage
- Key Features:
- Front-mounted Fingerprint Sensor, 4G VoLTE Support
Required Downloads for Flashing
You will need the following specific tools and drivers for Spreadtrum devices.
- SPD Upgrade Tool
- Spreadtrum USB Drivers
- A Celkon Ufeel 4G Firmware Package (choose a version from the table below)
Celkon Ufeel 4G Firmware Download Links
| Filename / Version (Build Date) | Android Version | Size | Download Link/s |
|---|---|---|---|
| Celkon_Ufeel_4G_V10 (Aug 2017) | 7.0 Nougat | 1GB | Download (MediaFire) |
| Celkon_Ufeel_4G_V06 (Jun 2017) | 7.0 Nougat | 1GB | Download (MediaFire) |
| Celkon_Ufeel_4G_V17 (May 2017) | 7.0 Nougat | 1GB | Download (MediaFire) |
| Celkon_Ufeel_4G_V12 (Feb 2017) | 7.0 Nougat | 1GB | Download (MediaFire) |
| Celkon_Ufeel_4G_V11 (Feb 2017) | 7.0 Nougat | 1GB | Download (Google Drive) |
How to Flash Celkon Ufeel 4G Firmware (.pac file)
This is a summary of the flashing process using SPD Upgrade Tool. For a more comprehensive guide with screenshots, please visit our detailed pillar article.
- Preparation: Download your chosen firmware version, the SPD Upgrade Tool, and Spreadtrum drivers. Extract all zip files into a single, easy-to-access folder.
- Driver Installation: Install the Spreadtrum USB drivers on your computer and restart if prompted.
- Load Firmware: Run
UpgradeDownload.exe. Click the first Gear icon (“Load Packet”) and select the.pacfirmware file you extracted. - Start Flashing: Click the Play button (“Start Downloading”) to put the tool into flashing mode.
- Connect the Phone: Power off your Celkon Ufeel 4G completely. Press and hold the Volume Down key. While holding the key, connect the phone to your PC via a USB cable.
- Completion: The tool should detect the phone and begin flashing. You can release the volume key once the progress bar appears. A green “Passed” message will indicate the process is complete. Disconnect the phone and power it on.
For in-depth instructions and troubleshooting for the SPD Upgrade Tool, please visit our complete guide: How to Use the SPD Upgrade Tool to Flash Your Smartphone.
Troubleshooting Common Issues
Here are some specific issues you might encounter with the Celkon Ufeel 4G.
1. Fingerprint Sensor Not Working or Unresponsive
Cause: A software glitch, corrupted driver, or a bad system update can cause the fingerprint sensor to stop working, even if the hardware is fine. The option might disappear from settings or fail to recognize any print.
Solution: A full firmware flash is the best way to fix this. It reinstalls the specific firmware for the fingerprint sensor hardware along with all the necessary system drivers, restoring its functionality if the cause was software-related.
2. SPD Upgrade Tool is Stuck or Shows an Error
Cause: Errors like “Failed: Uart send error” or the tool being stuck on “Checking baudrate” are almost always caused by driver issues or an improper connection sequence.
Solution: First, ensure the Spreadtrum drivers are correctly installed. Try a different USB port and cable. Most importantly, follow the connection sequence exactly: click “Start,” then hold the volume key, then connect the phone. If one volume key doesn’t work, try holding Volume Up or both volume keys together.
3. Persistent Malware or Adware
Cause: Budget smartphones can sometimes be targeted by malicious apps that install themselves as system services, making them difficult to remove with a factory reset.
Solution: Flashing the stock .pac firmware is the only guaranteed way to remove such infections. The process completely formats the device storage, wiping out all applications and data—including the malware—and replacing them with a clean, original system image.
Frequently Asked Questions (FAQs)
- Which of the many firmware versions should I use?
- We recommend you start with the file that has the latest build date, which is V10 from August 2017. If that version does not work for your specific device, the next logical choice is the file with the highest version number, V17 from May 2017.
- Will flashing this firmware remove the FRP (Google Account) lock?
- Yes, in most cases. A full flash using the SPD Upgrade Tool overwrites all device partitions, including the one that stores the FRP lock. This is a common and effective method for bypassing FRP on Spreadtrum devices.
- Why is my phone so slow after flashing?
- The Celkon Ufeel 4G is an entry-level device with 1GB of RAM. Android 7.0 Nougat can be demanding for these specs. A clean flash provides the best possible performance, but to maintain it, you should avoid installing many apps and use lightweight “Go” or “Lite” versions where available.
- Can I upgrade to a newer version of Android with these files?
- No. All of these firmware versions are for Android 7.0 Nougat. They cannot be used to upgrade to a newer Android version like Oreo.
Conclusion
Restoring the official stock firmware on your Celkon Ufeel 4G is the most effective method for fixing major software issues, from a non-working fingerprint sensor to a complete bootloop or malware infection. This guide provides all the available firmware versions and a reliable flashing method to get your device back into working order. Choose your firmware version carefully based on our recommendation, and always back up your data first.
If this guide helped you, please share your experience in the comments, especially which firmware version worked for you. Your feedback helps our community!
