Q1. My Micromax B4A is stuck on the logo screen (bootloop). Will this fix it?

Yes. A bootloop is a very common software issue, often caused by a failed update or corrupted system file. Flashing the official stock firmware is the most reliable way to fix this and get your phone working again.

Q2. I forgot my Google account and am stuck after a factory reset. How can I unlock my phone?

You are facing Factory Reset Protection (FRP). Flashing this stock firmware will completely wipe the phone’s memory, which also removes the FRP lock, allowing you to set up the device from scratch with a new Google account.

Q3. After flashing, will I lose my IMEI number?

If you use the recommended “Download Only” mode in SP Flash Tool, your IMEI number will be safe. You can lose your IMEI if you use the “Format All + Download” option, which should be avoided unless absolutely necessary as it erases the NVRAM partition.

Micromax B4A Stock ROM (Firmware) | Fix Bootloop & FRP Lock

The Micromax B4A is an entry-level 4G LTE smartphone from 2018 that runs on Android 8.1 Oreo. As a budget device, it is susceptible to various software issues over its lifespan, including severe lag, bootloops (getting stuck on the Micromax logo), and critical errors that make the phone unstable. This guide provides the official stock firmware, which is the definitive solution for users who need to unbrick their device, bypass the Google FRP lock, or perform a clean installation to resolve these frustrating software problems.

ℹ️ Important Note:
This phone is powered by a MediaTek MT6737M chipset. The flashing process requires the SP Flash Tool and will completely erase all your personal data. Ensure you have backed up any important files before you begin.

⚠️ Prerequisites: Before You Begin

Click Here for the Essential Pre-Flashing Checklist

Backup Your Data: All your contacts, photos, and files on the phone’s internal storage will be permanently wiped.
Charge The Battery: To prevent the phone from shutting down during the update, ensure the battery is charged to at least 50%.
Windows PC & USB Cable: You will need a Windows computer and a standard micro USB cable to perform the flash.

📱 Quick Device Specifications

Device: Micromax B4A
Chipset: MediaTek MT6737M
Display: ~5.0 inches
Operating System: Android 8.1 Oreo
RAM: 1GB
Storage: 8GB
Battery: ~2500 mAh

🛠 Required Tools & Downloads

File / Tool	Download Link
SP Flash Tool	Download Tool
MediaTek USB VCOM Drivers	Download Drivers

⬇️ Micromax B4A Stock ROM / Firmware

Android Version	Filename	Release Date	Size	Download Link
8.1 Oreo	Micromax_B4A_…_20180118_8.1.0.zip	2018-01-18	666 MB	Download (MediaFire)

Quick Steps to Flash Micromax B4A Firmware

Download and install the MediaTek VCOM drivers. Extract the firmware ZIP file (Micromax_B4A_..._8.1.0.zip) and the SP Flash Tool on your PC.
Launch flash_tool.exe. Click the “Scatter-loading” button and select the MT6737M_Android_scatter.txt file from the extracted firmware folder.
Ensure the flashing mode in the dropdown menu is set to “Download Only.”
Power off your phone completely. Click the green “Download” button in SP Flash Tool, then immediately connect the powered-off phone to your PC via USB cable.
The flash will start automatically. Once you see the green checkmark pop-up, you can disconnect the phone and power it on.

For a more detailed, step-by-step guide on this process, please refer to our main tutorial:
👉 Full Tutorial: How to Flash MediaTek Firmware with SP Flash Tool

❓ Frequently Asked Questions (FAQs)

Q1. My Micromax B4A is stuck on the logo screen (bootloop). Will this fix it?: Yes. A bootloop is a very common software issue, often caused by a failed update or corrupted system file. Flashing the official stock firmware is the most reliable way to fix this and get your phone working again.
Q2. I forgot my Google account and am stuck after a factory reset. How can I unlock my phone?: You are facing Factory Reset Protection (FRP). Flashing this stock firmware will completely wipe the phone’s memory, which also removes the FRP lock, allowing you to set up the device from scratch with a new Google account.
Q3. After flashing, will I lose my IMEI number?: If you use the recommended “Download Only” mode in SP Flash Tool, your IMEI number will be safe. You can lose your IMEI if you use the “Format All + Download” option, which should be avoided unless absolutely necessary as it erases the NVRAM partition.

🔧 Device Troubleshooting

The phone is still very slow after flashing: A clean firmware flash restores the phone to its best possible performance. However, with 1GB of RAM, it is important to manage expectations. The phone is designed for basic tasks, and heavy multitasking will still result in lag.