The Hotwav Cosmos V13 is a budget smartphone that is highly susceptible to software problems, which can leave the device completely unusable. The most critical issue users face is the phone being bricked or stuck in a bootloop, where it fails to start past the Hotwav logo. Another common complaint is the phone being infected with stubborn viruses or malware that slow down the device and cannot be removed with a simple factory reset. If your Hotwav Cosmos V13 is experiencing these issues, the only definitive solution is to flash the official stock firmware. This process will completely reinstall the operating system, fixing boot-up errors and removing all malware.
Hotwav Cosmos V13 Firmware Details
| Device | Hotwav Cosmos V13 |
| Model | Cosmos V13 |
| Chipset | Spreadtrum SP7731GEA |
| Android Version | 5.1 (Lollipop) |
| Firmware Type | .pac File |
| File Size | 669MB |
| File Type | .zip (Contains .pac file) |
| Flashing Tool | SPD Upgrade Tool |
Warning: Flashing new firmware is a powerful procedure that will permanently erase all data on your Hotwav Cosmos V13. Make sure to back up anything important if you can still access your device. A mistake during this process, like a power cut or using the wrong file, can permanently brick your phone. Please proceed with extreme caution.
Download Official Firmware for Hotwav Cosmos V13
Here is the official stock ROM for the Hotwav Cosmos V13. This package contains the .pac firmware file needed to perform a full software restore on your device.
📄 Filename: Hotwav_Cosmos_V13_SP7731GEA_5.1_SPD.zip
📦 Size: 669MB
🗓️ Build Date: N/A
🔢 Build Version: SP7731GEA
🤖 Android Version: 5.1 Lollipop
⬇️ Download Link: Download from Google Drive
How to Flash the Firmware
Since the Hotwav Cosmos V13 has a Spreadtrum (UNISOC) chipset, you will need to use the SPD Upgrade Tool on a Windows PC. Here are the five quick steps:
- Download and install the official Spreadtrum USB drivers on your computer.
- Download the firmware file from the link above and extract the .pac file from the zip archive.
- Download and launch the SPD Upgrade Tool application on your computer.
- Click on the “Load Packet” button (the gear icon) and select the .pac firmware file you extracted earlier.
- Power off your phone completely. Click the “Start Downloading” button (the play icon) in the tool, and then connect your phone to the PC while holding down the Volume Down button to start the process.
If you want to see all the steps with pictures and videos on how to flash the firmware, you should go here to see that: How to Use the SPD Upgrade Tool to Flash Your Smartphone.
Disclaimer: We will not be responsible if anything happens to your phone in the process of flashing the phone using the firmware files we provided above. This action is performed at your own risk. You can drop a comment on the thread if you experience any problems.

![Nokia 3.4 TA-1288 Firmware Flash File Download [Stock Rom] Nokia 3.4 TA-1288](https://www.inarguide.com/wp-content/uploads/2025/04/Nokia-3.4-TA-1288.jpg)
![Oppo Reno 5 Lite CPH2217 Firmware Flash File Download [Stock Rom] Oppo Reno 5 Lite CPH2217 Firmware](https://www.inarguide.com/wp-content/uploads/2025/04/Oppo-Reno-5-Lite-CPH2217-Firmware.jpg)


![Motorola Moto E20 XT2155-3 Firmware Flash File Download [Stock ROM] Motorola Moto E20 XT2155-3](https://www.inarguide.com/wp-content/uploads/2022/01/Motorola-Moto-E20-XT2155-3.jpg)