How to install Custom jelly bean ROM in your Micromax A90s
Software required:
Note:-Please take backup of your phone like media card data, contacts and everything because this process will permanently remove all the data.
Before you do this please make sure your ready to take all the risk. it could brick your phone if you don't follow the steps properly.
Please jot down your EMI no. somewhere. it might be required in worst case.
and in the end be patient.. :)
Steps:
1.First install A90s drivers (Note:-you can use above link(A90s Driver) to download it).
There are two version of driver once is for x86 family that is 32 bit and other is for 64 bit.
Please install it as per your PC hardware.
2. Extract SP Flash Tool and search for Flash_tool.exe. double click on it.
3. Follow the steps shown in below pic.
5. Go to BLU.. extracted folder and select this MT6577_Andriod_scatter_emmc.txt file
as shown in the above pic.
6. Once you are done with above step it will populate the grid with files as shown in below pic.
7. Now remove your phone battery and connect your mobile to your PC using data cable.
check if phone get detected or not if yes then proceed with the below steps else check that you have installed driver properly or not.
Now click on Format button(this process will erase ROM(Read on memory) and make your handset ready to write new OS)
Note:- please don't unplug data cable until it is done else you will brick your phone
8. If every thing goes well then you will able to see a Green Circle window.
Now we are ready to proceed further. we need it upgrade the Firmware.
Note:- Please don't disconnect your mobile or data cable. Be patient.
9. Now we need to write new OS(jellybean) on your mobile ROM. Follow the below steps
10.Once you Clicked the download it will start writing into your Phone ROM and the below red highlighted area of screen show will start showing progress in yellow and purple colour.
Note:-Until you get a green Circle window please don't unplug your mobile.
Once it done you can remove data cable put back battery and switch on your mobile.
viola ... you are done.