This page provides the official download link for the Celkon Mega 2 16 stock ROM, version V20. The Mega 2 16 was an entry-level smartphone from Celkon that offered a large display for its time. If your device is suffering from a bootloop, has been infected with malware, or is running extremely slow, flashing the stock firmware is the most effective way to fix it. This package contains the original Android 6.0 Marshmallow software in a .pac file format, designed for the Spreadtrum (SPD) chipset inside the device.
Reinstalling the firmware via the SPD Upgrade Tool will perform a complete wipe of the device’s storage, resolving deep-seated software errors and removing all user data and locks. It is the most reliable method to unbrick a Celkon Mega 2 16 and restore it to its original factory condition. Please follow the instructions carefully.
User Data and Security Advisory for the Celkon Mega 2 16 – Issued: 4:18 AM, Wednesday, September 17, 2025
Immediate Local Notice: This flashing process will permanently erase all your personal data (photos, contacts, etc.) from your Celkon Mega 2 16. A full backup is essential. Android 6.0 Marshmallow is critically outdated and has numerous unpatched security vulnerabilities.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 Mega 2 16: Quick Device Specifications
Please confirm these details match your device to ensure you are using the correct firmware file.
- Device Model:
- Celkon Mega 2 16
- Release Date:
- Circa 2017
- Chipset:
- Spreadtrum (Likely SC-series)
- Display:
- 5.5 inches
- Battery:
- Approximately 2500-3000 mAh
- RAM/Storage:
- 2GB RAM / 16GB Internal Storage
- Original OS:
- Android 6.0 Marshmallow
Required Downloads for Flashing
You will need the following specific tools and drivers for Spreadtrum devices.
- SPD Upgrade Tool
- Spreadtrum USB Drivers
- The Celkon Mega 2 16 Firmware Package (from the table below)
Celkon Mega 2 16 Firmware Download Links
| Filename / Version (Build Date) | Android Version | Size | Download Link/s |
|---|---|---|---|
| Celkon_Mega_2_16_V20 (May 2017) | 6.0 Marshmallow | 1.1GB | Download (Google Drive) |
How to Flash Celkon Mega 2 16 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 the drivers to be recognized properly.
- Load Firmware: Run
UpgradeDownload.exe. Click the first Gear icon (“Load Packet”) and select the.pacfirmware file you extracted. It may take a minute for the file to load into the tool. - Start Flashing: Click the Play button (“Start Downloading”) to put the tool into standby mode, ready to flash.
- Connect the Phone: Power off your Celkon Mega 2 16 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 the flashing process will begin. 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. The first boot will take longer than usual.
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 Mega 2 16.
1. SPD Upgrade Tool is Stuck on “Checking Baudrate”
Cause: This is a very common issue with Spreadtrum flashing that indicates a driver or connection problem. The computer is unable to establish a stable communication link with the phone’s chipset.
Solution: Ensure the Spreadtrum drivers are properly installed (reinstall them and restart your PC). Use a high-quality USB cable and connect directly to a main USB port on your computer, avoiding hubs. Most importantly, follow the connection sequence exactly: click “Start,” then press and hold the boot key (usually Volume Down), then plug in the cable.
2. Persistent Malware or Adware After Factory Reset
Cause: Some malware is designed to install itself onto the system partition, which means a standard factory reset (which only wipes the user data partition) will not remove it.
Solution: Flashing the stock .pac firmware is the only guaranteed way to remove these infections. The process completely reformats and rewrites the system partition, erasing all traces of the malicious code and replacing it with a clean, official system.
3. Performance Lag and Slow App Loading
Cause: While the Celkon Mega 2 16 has 2GB of RAM, its entry-level Spreadtrum processor can struggle with modern, resource-heavy applications. Over time, accumulated junk files and background processes can worsen this performance.
Solution: A clean firmware flash provides the best possible software environment for the hardware. After flashing, be mindful of the apps you install. Avoid running many apps at once and prefer “Lite” or “Go” versions of popular apps to conserve system resources and maintain a smoother experience.
Frequently Asked Questions (FAQs)
- Will this firmware remove a forgotten password or pattern lock?
- Yes. The flashing process erases all user data on the phone, which includes any screen lock security like PINs, passwords, or patterns. Your phone will be reset to its factory state.
- Why doesn’t the SPD Upgrade Tool detect my phone?
- This is almost always a driver issue. Ensure the Spreadtrum drivers are installed correctly and that you are using the correct “boot key.” Power the phone off, click Start in the tool, then press and hold either Volume Down or Volume Up *before* you plug in the USB cable. One of them will trigger the download mode.
- Can I play modern games on this phone?
- No, it is not recommended. The Celkon Mega 2 16 has a basic processor that is not designed for demanding 3D games. It is best suited for calls, messaging, and light browsing.
- Will this firmware fix the FRP (Google Account) lock?
- In most cases, yes. A full flash using the SPD Upgrade Tool often overwrites the device partitions where the FRP lock data is stored, effectively bypassing it. It is a common method for removing FRP on Spreadtrum devices.
Conclusion
Restoring the official stock firmware on your Celkon Mega 2 16 is the most effective way to solve major software issues, from a bootloop to stubborn malware. This guide provides the authentic firmware and a reliable flashing method to get your device back into working order. Remember that this process will erase all your data, so a backup is crucial if at all possible.
If this guide helped you, please share your experience in the comments. Your feedback helps our community!
