Before you flash: Flashing firmware will erase all data on your device. Back up contacts, photos, and apps before proceeding. FlashGuideHub is not responsible for any damage caused by following this guide.
About the Huawei Y3 2018
The Huawei Y3 2018 was released in May 2018, built on the MediaTek MT6737M platform. Marketed under model series CAG-Lxx (internal codename Cairo / CairoGO), the phone features a 5.0-inch display, a removable 2280 mAh battery, and Android 8.1 Oreo (Go edition).
Flashing factory stock firmware cures persistent software errors, repairs corrupted partition tables, and unbricks non-booting devices. Follow the verified file details and step-by-step SP Flash Tool instructions below to service your phone safely.
Which Flash Mode Should You Use?
SP Flash Tool Flashing (MediaTek Scatter)
Standard factory servicing procedure for MediaTek devices using MT6737M_Android_scatter.txt.
What You Need Before Flashing
A PC running Windows 7, 8, 10, or 11 with MediaTek USB VCOM drivers installed.
Confirm your phone model is CAG-L02, CAG-L03, CAG-L22, or CAG-L23 before downloading.
SP Flash Tool extracted and ready to load MT6737M_Android_scatter.txt.
Ensure the removable battery has sufficient charge to complete flashing.
Use a quality data cable plugged directly into a main computer USB port.
How to Flash the Huawei Y3 2018 — Quick Overview
A condensed step-by-step summary specific to the Huawei Y3 2018. Follow the full SP Flash Tool guide for screenshots, an interactive progress checklist, and complete troubleshooting.
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Install MediaTek USB VCOM driver and SP Flash Tool
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Extract firmware archive
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Load scatter file into SP Flash Tool
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Click Download and connect device
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Wait for green checkmark
Firmware Package for MediaTek MT6737M (Scatter ROM)
Firmware packages for the Huawei Y3 2018 (CAG Series) are built on MediaTek MT6737M architecture. These packages include MT6737M_Android_scatter.txt partition mapping files alongside raw boot, recovery, system, and modem baseband binaries.
MT6737M_Android_scatter.txt
Official Huawei Y3 2018 firmware comes as a scatter-based archive. Extract the zip file to find MT6737M_Android_scatter.txt and select it in SP Flash Tool.
Model check: Confirm that your device model is CAG-L02, CAG-L03, CAG-L22, or CAG-L23. Do not confuse this device with the separate Huawei Y5 Lite 2018 (DRA-LX5), which is powered by a different MediaTek MT6739 processor and requires a different scatter layout.
Huawei Y3 2018 Firmware Versions
Official stock firmware packages for the Huawei Y3 2018. Verify your exact model number (CAG-L02, CAG-L03, CAG-L22, or CAG-L23) before downloading.
| Version | Region | Android Version | Size | MD5 | Download |
|---|---|---|---|---|---|
8.1.0_r1 (C461B152) |
CIS / Europe / Regional (CAG-L22) | Android 8.1.0 Oreo (Go edition) | 1.50 GB | — | ⬇️ Download |
B048 Board Software (05022KSE) |
General / Factory Board (CAG-L03) | Android 8.1.0 Oreo (Go edition) | 1.15 GB | — | ⬇️ Download |
This device has 7 additional regional builds, Latin American Y5 Lite files, and factory board software. See the complete archive on AndroidFirmwareFile.com →
Huawei Y3 2018 — Important Notes
The Huawei Y3 2018 is equipped with a 2280 mAh removable battery. Flashing via SP Flash Tool writes system partitions over 3 to 6 minutes. Make sure your battery is charged to at least 40% before you start, and use a reliable USB cable connected directly to your computer.
Common Errors on the Huawei Y3 2018
BROM ERROR: S_BROM_CMD_STARTCMD_FAIL (2005)
Communication with the MediaTek processor was interrupted. Disconnect the USB cable, remove and reinsert the battery, hold Volume Down, and reconnect the cable.
SP Flash Tool: "PMT changed for the ROM; it must be downloaded"
Partition layout mismatch. Switch the flashing mode dropdown from "Download Only" to "Firmware Upgrade" and click Download.
Phone stuck in a bootloop on the Huawei logo after flashing
Residual user cache data can block initial startup. Turn off phone, hold Volume Up + Power to boot into stock recovery, and select "Wipe cache partition" and "Factory reset".
For solving common BROM connection errors and PMT partition table mismatches: MediaTek & SP Flash Tool Error Directory →
Frequently Asked Questions — Huawei Y3 2018
Turn the phone off completely. Press and hold the Volume Down button, then insert the USB cable connected to your PC. Once SP Flash Tool detects the MediaTek Preloader port and the red bar appears, release the button.
This error occurs when the partition layout on your phone differs slightly from the firmware image. In SP Flash Tool, change the dropdown option from "Download Only" to "Firmware Upgrade", then click Download to re-align partition tables safely.
Yes. SP Flash Tool communicates directly with the MediaTek MT6737M processor in BootROM mode before Android starts. It overwrites damaged boot and system partitions, making it the primary tool for unbricking.
Yes. Flashing a full scatter ROM writes clean system, cache, and userdata partitions, which erases all user files. Back up your important data first if the phone can still reach the home screen.
Ready to Flash?
Follow the full step-by-step SP Flash Tool guide with interactive progress tracking, prerequisite checklist, and complete troubleshooting.