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Root Micromax A90: Full Step-by-Step Guide

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Root Micromax A90: Full Step-by-Step Guide

Rooting your Micromax A90 gives you superuser access to the Android system, letting you remove bloatware, install custom ROMs, use root-only apps, and tweak performance. This guide walks you through unlocking the bootloader, flashing a custom recovery, and installing SuperSU to gain full root control. Before starting, back up all important data—rooting wipes your phone and voids the warranty.

What You’ll Need

  • Micromax A90 (also known as A90s) with at least 60% battery
  • USB data cable
  • Windows PC (or a virtual machine with USB passthrough)
  • Internet connection to download files
  • Backup of your personal data (contacts, photos, etc.)
  • SP Flash Tool (for MediaTek devices) – version 5.1352 or newer
  • Micromax A90 USB drivers (install before connecting phone)
  • Custom recovery image (e.g., TWRP or CWM) for Micromax A90
  • SuperSU zip file (latest stable, e.g., 2.82)
  • ADB and Fastboot tools (optional, for verification)

Step-by-Step

  1. Enable Developer Options and USB Debugging
    1. Go to Settings > About Phone.
    2. Tap Build Number 7 times until you see “You are now a developer!”.
    3. Go back to Settings > Developer Options.
    4. Turn on USB Debugging and OEM Unlocking (if available).
  2. Install USB Drivers on PC
    • Download and install the official Micromax A90 USB drivers.
    • Reboot your PC after installation.
  3. Back Up Your Data
    • Use built-in backup or copy files to PC.
    • Make sure Google sync is off or backed up.
  4. Unlock the Bootloader
    • Power off the phone.
    • Boot into fastboot mode by holding Volume Down + Power for 5 seconds.
    • Connect phone to PC via USB.
    • Open a command prompt in the ADB/fastboot folder.
    • Type fastboot devices to confirm detection.
    • Type fastboot oem unlock (or fastboot flashing unlock on newer Android).
    • Confirm on-screen prompt with volume keys.
    • This wipes data – proceed.
  5. Flash Custom Recovery via SP Flash Tool
    • Download SP Flash Tool and extract it.
    • Run flash_tool.exe as administrator.
    • Load the scatter file for Micromax A90 (usually in the ROM package or from the recovery zip).
    • Select only the Recovery partition in the list.
    • Click Download.
    • Power off phone completely (remove battery if possible, reinsert after 5 seconds).
    • Connect the powered-off phone to PC via USB.
    • Wait for the green checkmark – recovery is flashed.
  6. Boot into Custom Recovery
    • Disconnect phone from PC.
    • Turn on phone while holding Volume Up + Power until recovery menu appears.
    • If you see TWRP/CWM, proceed.
  7. Install SuperSU
    • Place the SuperSU zip on your phone’s internal storage (do it before booting into recovery).
    • In recovery, select Install (or Install Zip).
    • Navigate to the SuperSU zip and confirm.
    • Swipe to confirm flash.
    • After installation, select Reboot System.
  8. Verify Root
    • After reboot, install a root checker app from Play Store.
    • Open the app and tap Verify Root.
    • Grant SuperSU permission when prompted.
    • If it says “Root access is properly installed”, you’re done.

Common Mistakes

  • Wrong drivers: Using generic drivers causes connection issues. Install the exact Micromax A90 drivers.
  • Skipping backup: Bootloader unlock and flashing recovery wipe data. Always back up first.
  • Flashing wrong recovery: Using a recovery for a different device can brick your phone. Ensure the recovery is specifically for Micromax A90.
  • Not disabling antivirus: SP Flash Tool and SuperSU may be flagged by Windows Defender. Temporarily disable real-time protection.
  • Interrupting the flash: Do not unplug the USB cable during SP Flash Tool process – it can corrupt the recovery partition.
  • Forgetting to re-enable USB debugging after boot: Not required for root, but needed for future ADB commands.

Tips

  • Use a USB 2.0 port on your PC for better stability.
  • Keep the phone charged above 70% to avoid shutdown during flashing.
  • Download all files from reputable sources (XDA Developers forums are a good start).
  • After rooting, install a firewall app to control which apps get root access.
  • Make a Nandroid backup in recovery before making any system changes.
  • If you ever need to unroot, flash the stock ROM using SP Flash Tool.

Troubleshooting

  • Phone not detected by SP Flash Tool:
    • Reinstall drivers and try a different USB port.
    • Remove and reinsert battery, then reconnect.
    • Check Device Manager for unknown devices – update driver manually.
  • Bootloop after flashing recovery:
    • Boot into recovery (Volume Up + Power).
    • Wipe cache and dalvik cache.
    • If still stuck, reflash the stock ROM via SP Flash Tool.
  • Recovery not booting:
    • Try holding Volume Down + Power instead.
    • Re-flash recovery with SP Flash Tool, ensuring the scatter file matches.
  • SuperSU installation fails:
    • Download the correct SuperSU zip for your Android version (A90 runs Android 4.0/4.1).
    • Try flashing again after wiping cache.
  • Root checker says no root:
    • Reinstall SuperSU from recovery.
    • Ensure you granted permission in SuperSU when prompted.

Frequently Asked Questions

Q: Will rooting my Micromax A90 void its warranty?
Yes, rooting typically voids the manufacturer’s warranty. You can restore the warranty by flashing the stock ROM, but it’s not guaranteed.

Q: Can I get OTA updates after rooting?
No, OTA updates will likely fail because the system partition is modified. You’ll need to manually flash updates or use custom ROMs.

Q: Is it possible to unroot my phone?
Yes, you can unroot by flashing the stock ROM via SP Flash Tool, or by using the “Full unroot” option in SuperSU.

Q: What are the risks of rooting?
Risks include bricking your device, losing data, security vulnerabilities, and instability if you install incompatible mods.

Q: Do I need to unlock the bootloader before flashing recovery?
Yes, on most devices, including the Micromax A90, you must unlock the bootloader to flash a custom recovery.

Q: Can I root without a PC?
No, the Micromax A90 requires a PC for the initial bootloader unlock and recovery flash. After that, you can manage root from the phone.

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