The Mobicel Pulse 1 is a low-cost Android Go Edition smartphone built on the Spreadtrum SC7731E platform. With only 1GB RAM and Android 10 Go Edition, this phone is highly susceptible to freezing, lag, frequent app crashes, and especially bootloops—where the phone will not start beyond the Mobicel logo or keeps restarting. Connectivity failures (Wi-Fi, Bluetooth bugs), battery-related random reboots, and camera launch errors also appear after a few months of heavy use. Full stock firmware reinstallation via the official PAC file is the most reliable way to recover genuine system stability and factory performance.
This guide is for the official PAC firmware for Mobicel Pulse 1. Devices running Spreadtrum/Unisoc hardware must be flashed using the SPD Upgrade Tool (not SP Flash Tool).
Mobicel Pulse 1 Firmware Details
Reference hardware specs for correct firmware flashing and troubleshooting:
| Attribute | Details |
|---|---|
| 📱 Device | Mobicel Pulse 1 |
| 🆔 Chipset | Spreadtrum SC7731E quad-core 1.3GHz |
| 🤖 Android OS | Android 10 Go Edition |
| ✅ Latest Builds | LGM_011221, SP7731E_LGM_DMART_111121_10_MIRA |
| 📂 File Type | PAC Firmware |
| 💻 Flashing Tool | SPD Upgrade Tool |
Download Official Firmware for Mobicel Pulse 1
- Build: LGM_011221
- File Name: Mobicel_Pulse_1_LGM_011221_SPD.zip
- Size: 988MB
- 🔗 Download Link: Download (MediaFire)
- Build: SP7731E_LGM_DMART_111121_10_MIRA
- File Name: Mobicel_Pulse_1_SP7731E_LGM_DMART_111121_10_MIRA.zip
- Size: 982MB
- 🔗 Download Link: Download (MediaFire)
Why Flash This Specific Firmware?
- Fix Bootloop and Stuck-on-Logo: Device won’t start, keeps restarting, or freezes at Mobicel logo—full PAC reflash replaces corrupt system files and allows genuine boot.
- End Frequent System Lags, Freezing or App Crash: Reinstalling firmware clears software clutter, malware, and rogue apps, restoring stable system performance.
- Repair Camera and Wireless Bugs: Firmware flashing reloads device drivers for Wi-Fi, Bluetooth, and camera modules—most bugs disappear after a clean reflash.
- Address Battery or Random Reboots: Reboots at random; new firmware can resolve software power management bugs before battery is replaced.
- Unbrick or Recover After Modding/Update Failure: If device is unresponsive after a failed update or failed mod, PAC file restoration usually returns original function unless severe hardware damage.
Crucial Prerequisites Before Flashing
Backup all data before beginning—flashing wipes all storage and resets device.
- SPD Upgrade Tool for PAC files.
- Spreadtrum/Unisoc USB drivers installed for Windows.
How to Flash the Firmware
- Download and extract chosen PAC firmware zip.
- Install Spreadtrum USB drivers on PC.
- Run SPD Upgrade Tool (UpgradeDownload.exe).
- Click gear icon to load
.pacfile from extracted folder. - Power off phone, remove battery if possible.
- Hold Volume Down and connect the device via USB.
- Click “Start Downloading” in tool, wait for green “Passed” result.
Find step-by-step visuals here: How to Use the SPD Upgrade Tool
Disclaimer: Flashing deletes all user data and carries risk if interrupted or done incorrectly. Proceed at your own risk.
