This page provides the official download link for the Celkon Diamond Ace stock ROM, version V18. The Diamond Ace was an entry-level smartphone from 2017 with a compact 5-inch display. If your device is stuck on the Celkon logo (bootloop), has been infected with malware, or is completely dead (soft-bricked), flashing the stock firmware is the most effective solution. This package contains the original Android 6.0 Marshmallow software in a .pac file format, designed to be installed with the SPD Upgrade Tool on its Spreadtrum chipset.
Reinstalling the firmware will perform a deep format of your device’s storage, completely removing all data, screen locks, and malware. It is the definitive method to unbrick a Celkon Diamond Ace and restore it to its original factory condition. Please follow the instructions carefully, as the process for Spreadtrum devices is specific.
Immediate Local Notice: This flashing process will permanently erase all your personal data (photos, contacts, etc.) from your Celkon Diamond Ace. A full backup is essential. As of today, Android 6.0 Marshmallow is critically outdated and has numerous unpatched security vulnerabilities.
Celkon Diamond Ace: Quick Device Specifications
Please confirm these details match your device to ensure you are using the correct firmware file.
- Device Model:
- Celkon Diamond Ace
- Release Date:
- 2017
- Chipset:
- Spreadtrum SC9832 (Quad-core 1.3 GHz)
- Display:
- 5.0 inches, 480 x 854 pixels (FWVGA)
- Battery:
- 1800 mAh, Removable Li-Ion
- RAM/Storage:
- 1GB RAM / 8GB Internal Storage
- Key Features:
- 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
- The Celkon Diamond Ace Firmware Package (from the table below)
Celkon Diamond Ace Firmware Download Links
| Filename / Version (Build Date) | Android Version | Size | Download Link/s |
|---|---|---|---|
| Celkon_Diamond_Ace_V18 (Jan 2017) | 6.0 Marshmallow | 1GB | Download (Google Drive) |
How to Flash Celkon Diamond Ace 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 the firmware, SPD Upgrade Tool, and Spreadtrum drivers. Extract all zip files into a single folder on your PC.
- Driver Installation: Install the Spreadtrum USB drivers. You may need to restart your computer for them to function correctly.
- 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 prepare the tool for flashing.
- Connect the Phone: Power off your Celkon Diamond Ace 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 will detect the phone and the flashing will begin. You can release the volume key once the progress bar starts moving. A green “Passed” message will appear when the process is complete. You can now disconnect and power on your phone.
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 Diamond Ace.
1. 4G VoLTE Not Working or No Network Signal
Cause: If your phone can’t make calls over 4G or has no signal, it could be due to corrupted modem firmware, especially after a failed update or rooting attempt.
Solution: A full flash with the official .pac file is the best fix. It restores the original, factory-tested radio and baseband firmware, which can resolve software-based connectivity problems and restore VoLTE functionality.
2. SPD Upgrade Tool is Stuck or Fails to Start
Cause: This issue, often indicated by the tool being stuck on “Checking Baudrate,” is almost always related to drivers not being installed correctly or the phone not being in the right mode.
Solution: Reinstall the Spreadtrum drivers and restart your PC. Use a different USB port and a known-good cable. Most importantly, follow the connection sequence precisely: power off the phone, click “Start” in the tool, press and hold Volume Down, then plug in the cable.
3. Persistent Malware or Adware
Cause: Entry-level phones can sometimes be targeted by malicious apps that install themselves as system services, making them difficult to remove.
Solution: A complete firmware flash via SPD Upgrade Tool is the only guaranteed way to remove such infections. The process formats the entire user and system data partitions, wiping out all traces of the malware.
Frequently Asked Questions (FAQs)
- Will this firmware remove the FRP (Google Account) lock on my Celkon Diamond Ace?
- Yes, it is highly likely. Flashing a full
.pacfirmware with the SPD Upgrade Tool typically overwrites the partition that stores the FRP data, effectively removing the lock. This is a common method for bypassing FRP on Spreadtrum devices. - Why is my phone so slow after flashing the new firmware?
- While the firmware flash provides a clean system, the Celkon Diamond Ace has entry-level hardware (1GB of RAM). Android 6.0 Marshmallow can be demanding for these specs. To maintain the best possible performance, avoid installing many apps and use lightweight “Go” or “Lite” versions where available.
- Is this phone the same as the Celkon Diamond 4G Plus?
- They are very similar devices with many shared specifications, including the display and RAM. However, they are distinct models, and their firmware files are not interchangeable. You must use the firmware specifically made for the Diamond Ace.
- Can I upgrade to a newer version of Android with this file?
- No. This is the official Android 6.0 Marshmallow firmware for the Celkon Diamond Ace. It cannot be used to upgrade to a newer Android version.
Conclusion
Restoring the official stock firmware on your Celkon Diamond Ace is the most effective way to solve major software issues, from a bootloop to persistent network problems or malware. This guide provides the authentic firmware and a reliable flashing method to get your device back into working order. Remember to back up your data before starting, and be mindful of the security limitations of using an older Android version.
If this guide helped you, please share your experience in the comments. Your feedback helps our community!
