Celkon Smart 4G Firmware Flash File Download [Stock Rom]

This page provides the official download links for all available versions of the Celkon Smart 4G stock ROM. The Smart 4G is a compact, ultra-budget 4-inch smartphone designed to deliver basic 4G VoLTE connectivity. If your phone is stuck on the Celkon logo, has been infected with malware, or is experiencing software-related network issues, flashing the stock firmware is the ultimate solution. This package contains the original Android 6.0 Marshmallow software in a .pac file format, meant for installation with the SPD Upgrade Tool.

Reinstalling the firmware will perform a complete wipe, removing all data, screen locks, and viruses. It is the most effective way to unbrick a Celkon Smart 4G and restore it to a clean, factory state. We have listed multiple firmware versions below; please read the note under the table for guidance on which to choose.

Celkon Smart 4G: Quick Device Specifications

Please confirm these details match your device to ensure you are using the correct firmware file.

Device Model:

Celkon Smart 4G

Release Date:

Circa 2017

Chipset:

Spreadtrum SC9832 (Quad-core 1.3 GHz)

Display:

4.0 inches, 480 x 800 pixels (WVGA)

Battery:

1500 mAh, Removable Li-Ion

RAM/Storage:

1GB RAM / 8GB Internal Storage

Key Features:

Compact Size, 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 Smart 4G Firmware Package (choose a version from the table below)

Celkon Smart 4G Firmware Download Links

How to Flash Celkon Smart 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.

1. Preparation: Download your chosen firmware version, the SPD Upgrade Tool, and Spreadtrum drivers. Extract all zip files into a single, easy-to-access folder.
2. Driver Installation: Install the Spreadtrum USB drivers on your computer and restart if prompted.
3. Load Firmware: Run UpgradeDownload.exe. Click the first Gear icon (“Load Packet”) and select the .pac firmware file you extracted.
4. Start Flashing: Click the Play button (“Start Downloading”) to put the tool into flashing mode.
5. Connect the Phone: Power off your Celkon Smart 4G completely. Press and hold the Volume Down key. While holding the key, connect the phone to your PC via a USB cable.
6. 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 Smart 4G.

1. 4G VoLTE Not Working or No Network

Cause: A failed update or software corruption can damage the modem configuration files, leading to an inability to connect to the 4G network or make VoLTE calls.

Solution: A full flash with the official stock .pac file is the best way to resolve this. It restores the original, correct radio and modem firmware, which can fix software-based connectivity problems.

2. SPD Upgrade Tool is Stuck on “Checking Baudrate”

Cause: This is a classic Spreadtrum driver or connection issue. The computer is trying to communicate with the phone but is not getting the correct response.

Solution: Reinstall the Spreadtrum drivers and restart your PC. Use a different USB port (preferably one on the back of your computer) and a high-quality USB cable. Make sure to press and hold the correct boot key (usually Volume Down) *before* plugging in the cable.

3. The Phone is Very Slow After Flashing

Cause: The Celkon Smart 4G is an entry-level device with very limited hardware (1GB RAM, 4-inch display). Android 6.0 and modern apps can be demanding for it.

Solution: Flashing the stock ROM provides a clean system, which is the fastest the phone can be. To maintain performance, avoid installing many apps, especially resource-heavy ones like Facebook or Chrome. Use lighter alternatives (“Go” or “Lite” apps) whenever possible.

Frequently Asked Questions (FAQs)

Which of the four firmware versions should I use?

We recommend you start with the file that has the latest build date, which is V09 from October 2017. If that version does not work for your specific device, the next logical choice is the file with the highest version number, V14 from August 2017.

Will flashing this firmware remove the FRP (Google Account) lock?

Yes, in most cases. A full flash using the SPD Upgrade Tool overwrites the device partitions, including the one that stores the FRP lock. This is a common and effective method for bypassing FRP on Spreadtrum devices.

Can I play games like PUBG or Call of Duty on this phone?

No, absolutely not. The Celkon Smart 4G has very basic hardware that is not capable of running demanding 3D games. It is designed for calls, messaging, and light browsing only.

What if my phone is still stuck on the logo after a “Passed” message?

The first boot after a full flash can take up to 10-15 minutes, so be patient. If it is still stuck after that, try flashing a different version of the firmware from the table above (e.g., if you used V09, try V14), as there may be minor hardware variations.

Conclusion

Restoring the official stock firmware on your Celkon Smart 4G is the most effective way to fix major software issues, from a bootloop to malware infections or network problems. This guide provides all the available firmware versions and a reliable flashing method to get your compact device back in 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!