This flash file tested by me without any error working well, you can use this flash file when your device hang on logo problem, restarting problem, security lock problem, password lock problem, pattern lock problem etc software related problem and you can use this tutorial without any box and this is free for all who know about software in mobile, impotent for flashing first must check your micro usb cable if not good then you can't flash it so check micro usb cable second check your device battery that is impotent for flashing if your device battery low so stop your device between flash so this is impotent for flash, before you flash save your data like contact, photos, videos etc because this is factory flash file so you can't save after full flash so must remember all are impotent notes.
Download Link
Micromax A37b firmware or flash tool download here
Required for flash:
1. Micromax A37b device with good battery charged
2. Micromax A37b tested firmware or flash tool
3. Micro usb cable
4. Computer or Laptop
Procedure:
1. Take tested firmware or flash tool from above link (if link not working just write down comment on below comment box)
2. Extract to zip file to desktop or as you like path (must be installed winrar software in your computer or laptop)
3. Open SP Flash Tool v3.1344.214 folder and choose flash_tool.exe file and open it
4. Click on Scatter-loading button and choose MT6572_Android_scatter.txt file from Firmware folder
5. Now click on Download button or shortcut key F9
6. Press and hold Volume Up button and insert usb cable
7. Wait until driver install, if driver installed in your computer or laptop then downloading automatically in your device
8. Wait until full install (do not disconnect device while flashing)
9. You are done
Micromax A37b Bolt Flash done with flash tool screenshot:
Micromax A37b Bolt Flash done with flash tool video:
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