Mito Z1 Firmware Flash File Download [Stock Rom]

The Mito Z1 is an entry-level Android smartphone, favored in Indonesia and neighboring regions for its value hardware and simple features. Packing a Spreadtrum/UNISOC chipset, 3GB RAM, and a 5.7-inch HD IPS display, the device runs stock Android and is intended for basic tasks. However, user forums and repair specialists frequently report system stability issues: bootloops after malware infections, random reboots following failed app installs, and persistent lag or freezing when internal storage fills up. These problems are often resolved only by full firmware flashing using the SPD Upgrade Tool with the official.PAC file.

All download and repair instructions below use the official factory ROM. Do not use QFIL or SP Flash Tool; Spreadtrum-powered devices require SPD Upgrade Tool or similar UNISOC flasher.

Mito Z1 Firmware Details

The table below summarizes technical specs and ROM package information. Flashing restores the phone to its original 2019 software, resolves deep-seated OS issues, and removes persistent malware.

Download Official Firmware for Mito Z1 (SPD)

• Build: V09 20190506
  • File Name: Mito_Z1_V09_20190506_SPD.zip
  • Size: 1.35GB
  • 🔗 Download Link: Download (MediaFire)

Why Flash This Specific Firmware?

Full firmware restoration provides a proven solution for:

• Bootloop at Logo/Malware Symptoms: Users often report being locked in a bootloop after malware infections, especially after installing adware or system apps. Flashing this clean ROM fully wipes the system and restores the device to default, removing viruses and stuck-on-logo screens.
• Unbrick after Failed Updates: If a system update or custom mod causes your Mito Z1 to hang at boot or fail to power on, flashing official firmware via SPD Upgrade Tool is the main recovery method.
• Fix Random Restarts and Freezes: Owners frequently describe daily reboots, freezing, or system crashes—especially when RAM is full or storage is nearly used up. A full firmware flash corrects corrupt OS files and restores responsiveness.
• Remove Persistent Malware/Adware: Certain malware infections on low-end Android phones cannot be eradicated by simple factory reset—only full flashing using.PAC firmware reliably cleans the system.

Crucial Prerequisites Before Flashing

Back up your contacts and files beforehand, as the flashing process erases all user data!

• Latest SPD Upgrade Tool (Windows PC version)
• Official Spreadtrum/Unisoc USB drivers installed on your computer

How to Flash the Firmware

Flash the Mito Z1 PAC file with SPD Upgrade Tool:

1. Extract Mito_Z1_V09_20190506_SPD.zip to a dedicated folder.
2. Install Spreadtrum USB drivers (automatic via SPD Upgrade Tool installer, or manual if Windows fails to detect your phone).
3. Launch SPD Upgrade Tool.
4. Click “Load Packet” and select the extracted .PAC file.
5. Power off the Mito Z1, then connect it to the PC via USB while holding the Volume Down button.
6. Click “Start Download” in SPD Upgrade Tool. Flashing begins and will complete once you see the “Passed” notification (green).
7. Disconnect the phone and power it on—it should boot normally.

For a complete tutorial with screenshots, see:

How to Use SPD Upgrade Tool to Flash Your Smartphone (.PAC Firmware)

Disclaimer: Flashing firmware deletes all content and carries a risk of device damage if done incorrectly. Proceed carefully and use official drivers and tools.