The ZTE Blade L111 is an ultra-compact 3G smartphone designed for absolute accessibility and basic communication. With its pocket-friendly 4.0-inch display and a UNISOC (Spreadtrum) chipset, it runs a light version of Android perfect for essential tasks. This guide provides the official stock ROM (.pac file), the definitive tool for reviving a bricked device, fixing software glitches, removing a screen lock, or performing a complete factory restore.
Important: This firmware is specifically for the ZTE Blade L111. As a UNISOC/Spreadtrum device, it requires the SPD Upgrade Tool for flashing. Flashing this on a different model will cause a hard brick. This process will erase all data on your device.
Quick Device Specs
- Device: ZTE Blade L111
- Release year: 2017
- Chipset: UNISOC SC7731 (3G connectivity)
- Display: 4.0″ TFT Display
- Battery: 1400 mAh
- Original OS: Android 5.1 Lollipop
Required Downloads
To flash a Spreadtrum/UNISOC device, you will need the specific drivers and flashing tool. You can find the downloads for these in our main guide linked below.
- SPD Upgrade Tool or SPD Research Tool
- Spreadtrum/UNISOC USB Drivers
Stock ROM (Firmware)
| Region / Carrier | Build Date | Android | Type | Download | Chipset |
|---|---|---|---|---|---|
| Generic / Unspecified | 2017-05-05 | 5.1 | SPD .pac Firmware |
Download | UNISOC/SPD |
How to Flash the Stock Firmware
Restoring your ZTE Blade L111 to its original software is done with a Windows PC and the SPD Upgrade Tool. The core steps involve installing the correct Spreadtrum drivers, loading the single .pac firmware file into the tool, and connecting your phone while it’s powered off and you’re holding the Volume Down key to start the process.
For the complete, step-by-step guide with pictures and download links for the tools, please see our main pillar article: How to Use the SPD Upgrade Tool to Flash Your Smartphone.
Device-Specific Troubleshooting for ZTE Blade L111
- PC Not Detecting the Phone? Check Drivers First: The most common problem is a driver issue. The SPD Upgrade Tool will not see your phone if the drivers aren’t installed correctly. You must install the Spreadtrum VCOM drivers, which often requires disabling ‘Driver Signature Enforcement’ in Windows first.
- Using the Correct Boot Key Sequence: The phone must be fully powered off. Click the “Start” button in the flash tool first. Then, press and hold the Volume Down button on your phone and connect the USB cable. Do not release the button until you see the ‘Downloading’ progress bar appear.
- Locked Out by Google Account (FRP): If you are stuck on the Google account setup screen after a factory reset, flashing this stock ROM will completely wipe the device and remove the FRP lock, allowing you to set it up from scratch.
- Network and SIM Card Issues: Remember that the Blade L111 is a 3G-only device. After flashing, if your SIM card is not detected or you have no signal, first confirm you are in an area with 3G coverage, as many mobile carriers are shutting down their 3G networks.
FAQs
Q1. Why would I need to flash the stock ROM on this phone?
For an older, low-spec device like the Blade L111, flashing the stock ROM is the best way to fix common problems like extreme slowness, constant app crashes, viruses, or to bypass a forgotten screen lock password.
Q2. What is a .pac file?
A .pac file is a packed firmware file used for Spreadtrum/UNISOC chipsets. It contains all the necessary partitions—system, boot, recovery, etc.—in a single, integrated file for flashing.
Q3. Is it possible to install custom ROMs on the Blade L111?
Due to its age, very basic hardware, and Spreadtrum chipset, there is virtually no custom ROM development for this device. Sticking with the official stock ROM is the only stable and recommended option.
Q4. Will this erase all my data?
Yes. Flashing the stock ROM is a factory reset process that will completely and permanently erase all personal data, photos, contacts, and apps from the phone’s internal storage.
