Must Read: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 Bolt A089 Firmware download
hereSP Flash Tool v 3.1352.01 Flash download
hereRequired for flash:
1. Micromax bolt A089 device with good battery charged
2. Micromax bolt A089 tested firmware or flash tool
3. Micro usb cable
4. Computer or Laptop
Procedure:
1. Download firmware or flash tool from above link
2. Extract it to desktop or as you like path
3. Open SP Flash Tool v 3.1352.01folder
4. Click on Scatter-loading button
5. And choose MT6572_Android_scatter.txt file from Micromax_A089_EI_V0.13_user(20140124) folder
6. Now Click on Download button or shortcut key F9
7. Press and hold Volume Up and insert usb cable
8. Wait until full flash
9. You are done
Micromax Bolt A089 Flash done with flash tool screenshot: