Unlock Bootloader & Install CWM Recovery on Android One [Micromax canvas A1] [Karbonn Sparkle V] [Spice Dream UNO]

Step 1. Download the ADB and fastboot drivers here and extract the folder on your desktop.
Step 2. Switch off your phone and boot it in bootloader/fastboot mode. To do this Hold Volume Up Key + Volume Down Key and then press the Power button.
Step 3. Now open the ADB folder on your desktop and Press Shift key + Right click on any empty space inside the folder, and select Open command window here.
Step 4. Execute following commands
fastboot oem unlock
fastboot format userdata

Now the bootloader is unlock and next step is to install the CWM recovery.
Step 5. Download the recovery.img from here and paste the recovery.img file in the ADB folder. (The same folder that your downloaded in step 1)
Step 6. Reboot the phone into bootloader/fastboot mode. To do this open the ADB folder on your desktop and Press Shift key + Right click on any empty space inside the folder, and select Open command window here. And enter the folowing command.
adb reboot bootloader
Step 7. Now your phone is booltloader mode. Flash the recovery image and reboot
fastboot flash recovery recovery.img
fastboot reboot

Now the phone will reboot and CWM recovery is installed on your Android One device.


SOURCES