The Mobicel Rio is an ultra-budget smartphone that runs on Android 8.1 Oreo (Go Edition), a lightweight version of Android designed for entry-level devices. It is powered by a Spreadtrum/UNISOC chipset, which is common in this category. Due to its limited hardware resources, the Mobicel Rio is highly susceptible to software degradation, leading to common problems like the phone getting stuck on the Mobicel logo (bootloop), extreme unresponsiveness, and critical system errors that can brick the device. For owners facing these issues, performing a clean installation of the stock firmware is the only reliable method to restore functionality.
This guide provides the official .pac firmware for the Mobicel Rio. It must be installed using the SPD Upgrade Tool on a Windows computer.
Mobicel Rio Firmware Details
Below are the key details for the Mobicel Rio stock ROM. Flashing this firmware will restore the device to a clean state of Android 8.1 Oreo (Go Edition). This is a Spreadtrum device and requires the SPD Upgrade Tool, not tools for other chipsets.
| Attribute | Details |
|---|---|
| 📱 Device | Mobicel Rio |
| 🆔 Chipset | Spreadtrum/UNISOC |
| 🤖 Android OS | 8.1 Oreo (Go Edition) |
| ✅ Build Version | SS_290520_8.1.0 |
| 📂 File Type | PAC Firmware |
| 💻 Flashing Tool | SPD Upgrade Tool / ResearchDownload |
Download Official Firmware for Mobicel Rio
- Build: SS_290520_8.1.0
- File Name: Mobicel_Rio_SS_290520_8.1.0_SPD.zip
- Size: 803MB
- 🔗 Download Link: Download (Google Drive)
Why Flash This Specific Firmware?
Based on common issues reported by users of Android Go devices with Spreadtrum chipsets, flashing the stock .pac firmware is the best solution for the following problems:
- Fix Bootloop and Freezing: This is the most common failure. If the phone is stuck at the Mobicel logo or freezes constantly, reinstalling the OS with this firmware will fix the corrupted system files.
- Unbrick a Dead Mobicel Rio: If the phone is completely dead and won’t turn on due to a software error, flashing this file is the standard procedure to bring it back to life.
- Bypass FRP (Google Account Lock): Flashing the stock ROM is a crucial first step for users locked out of their device after a factory reset. It provides a clean, unmodified system to work on for FRP removal.
- Improve Sluggish Performance: Android Go can become very slow over time. A clean flash removes all residual files and cache, restoring the phone to its original, faster performance level.
- Repair “Unfortunately, App Has Stopped” Errors: Persistent system and app crashes are a clear sign of software corruption that only a full firmware reinstallation can properly fix.
Crucial Prerequisites Before Flashing
This process will permanently erase all user data. Back up your files if possible before you start.
- The latest version of the SPD Upgrade Tool.
- The correct Spreadtrum/UNISOC USB drivers installed on your PC.
- The
.pacfirmware file provided above.
How to Flash the Firmware
This .pac firmware must be installed using the SPD Upgrade Tool. The basic steps involve loading the firmware packet into the tool, starting the download process, and then connecting your powered-off phone while holding the Volume Down key to initiate the flash.
For a complete, step-by-step tutorial with screenshots, please follow our master guide:
→ How to Use the SPD Upgrade Tool to Flash Your Smartphone
Disclaimer: Flashing firmware is an advanced procedure that will erase all your data and carries a risk of permanently damaging your device if not performed correctly. We are not responsible for any data loss, hardware failures, or bricked devices. Proceed with extreme caution.
