Mobicel Ruby Firmware Flash File Download [Stock Rom]

The Mobicel Ruby is an entry-level smartphone designed for basic use, running Android 8.1 Oreo (Go Edition). It is powered by a Spreadtrum/UNISOC SP7731E chipset, a processor built for ultra-budget devices. Due to its minimal hardware specifications, the Mobicel Ruby is prone to significant software issues, including severe performance lag, applications crashing, and freezing during normal operation. These problems can corrupt system files, leading to a bootloop (stuck on the Mobicel logo) or even a completely dead (bricked) device. For these critical errors, reinstalling the official stock firmware is the most reliable solution to restore the phone to working condition.

This guide provides the official .pac firmware for the Mobicel Ruby, which must be flashed using the SPD Upgrade Tool.

Mobicel Ruby Firmware Details

Below are the specifications for the Mobicel Ruby. This firmware will restore the device to its original Android 8.1 Oreo (Go Edition) software. Note that this is a Spreadtrum/UNISOC device and requires the SPD Upgrade Tool.

Download Official Firmware for Mobicel Ruby

• Build: Mobicel_Ruby_SP7731E_051019_8.1.0
  • File Name: Mobicel_Ruby_SP7731E_051019_8.1.0_MIRA.zip
  • Size: 750MB
  • 🔗 Download Link: Download (MediaFire)

Why Flash This Specific Firmware?

Based on widespread user issues for entry-level Spreadtrum devices, flashing the stock .pac file is the best way to solve the following problems:

• Fix a Bootloop or Frozen Screen: If your Mobicel Ruby is stuck on the startup logo or completely frozen and unresponsive, flashing this firmware will replace the entire corrupted OS and force it to boot correctly.
• Repair Null or Invalid IMEI: A common issue after incorrect flashing or a software glitch on Spreadtrum devices is the loss of the IMEI number, which prevents the phone from making calls or using mobile data. This stock ROM can help restore the baseband partition needed to repair the IMEI.
• Resolve “Unfortunately, App Has Stopped” Errors: Persistent app crashes and system UI errors are often due to software corruption. A clean flash provides a stable environment and resolves these conflicts.
• Essential Step for FRP (Google Lock) Removal: If the device is stuck on the Google account verification screen after a reset, installing the stock firmware ensures the system is clean before you attempt any FRP bypass procedures.
• Unbrick a Dead Mobicel Ruby: If the phone is completely dead and does not power on, flashing this firmware via the SPD Upgrade Tool is the standard procedure to revive it, as long as the hardware is not damaged.

Crucial Prerequisites Before Flashing

Before you begin, understand that this process will completely erase all data on the device. Back up anything important if you can still access your phone.

• The latest version of the SPD Upgrade Tool or ResearchDownload Tool.
• The correct Spreadtrum/UNISOC USB drivers installed on your Windows PC.
• A functioning Micro-USB cable.

How to Flash the Firmware

This firmware is in .pac format and must be installed using the SPD Upgrade Tool on a Windows computer. Follow these steps carefully.

1. Download and extract the Mobicel_Ruby_..._MIRA.zip file to get the .pac firmware file.
2. Download and extract the SPD Upgrade Tool.
3. Install the Spreadtrum USB drivers on your PC. It’s best to restart your computer after installation.
4. Launch the SPD Upgrade Tool (UpgradeDownload.exe).
5. Click on the single Gear icon (Load Packet) in the top-left corner.
6. Navigate to the folder where you extracted the firmware and select the .pac file.
7. Once the firmware is loaded, click the Play icon (Start Downloading) to put the tool in standby mode.
8. Completely power off your Mobicel Ruby.
9. Press and hold the Volume Down button on your phone, and while holding it, connect the device to your PC with the USB cable.
10. The tool will automatically detect the phone and the flashing process will begin. You can release the Volume Down button once you see the progress bar start.
11. Wait patiently for the process to complete. You will see a green “Passed” message in the tool once it is finished.
12. You can now disconnect your phone and power it on. The first boot may take several minutes.

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.