instructions for rooted:
1. extract the downloaded zip file and copy both files to the root of your sdcard
2. install "Mobileuncle Tools_20130223v2.8.0.apk"
3. open mobileuncle tools and select "Recovery Update"
4. select the detected "recovery.img"
5. click OK, then restart to recovery
instructions for non-rooted:
SP Flash Tool by mediatek
1. Install VCOM drivers
2. Make sure that your phone is disconnected from the PC and the battery is removed.
3. Open SP Flash Tool. Click Scatter-loading button to load the downloaded scatter file
4. double-click RECOVERY on the left side and it will ask you the location of the recovery.img. double-click to load it.
5. MAKE SURE that ONLY "RECOVERY" on the left side is checked
6. Click Download or press F9. You will receive a Download Warning message.
7. SP Flash Tool trick: After clicking YES, connect the phone to the USB (without the battery), then insert the battery right away.
8. Flashing will start, after the yellow bar is complete you will receive a "Download OK" windows with a green circle.
9. Close it and the SPFT program. Disconnect the phone and boot it to recovery.
Obligatory Disclaimer: Follow the steps EXACTLY. I will not be responsible with what happens on your phone.