Tendo

Installation Instructions:

1. Download The file from the given link above.
2. To flash this file your A900 must be rooted and have custom recovery If your phone is not rooted kindly refer to this post for rooting procedure http://appsandtips.blogspot.com/2014/09/root-qmobile-all-smartphones-easily.html
3. For installing custom recovery in your phone kindly follow these steps:
   1. download and install MTKtools from playstore
   2. Download CWMR from here : http://d-h.st/Sle
   3. Open MTKtools
   4. Select recovery update option
   5. Browse to your downloaded CWMR and apply it
   6. Now place the downloaded file (octarom_kk_discovery_1.zip) in the root of your SD card
   7. Turn off your phone
   8. Go to the recovery mode  by pressing and holding Volume Up + Power button at the same time
   9. First make a backup of your current ROM so if you mess up somewhere you can go back to your old ROM
4. Select back and restore and then select backup. Wait until its done
1. Now go back and select Wipe/data or Factory Reset
2. Select wipe cache partition
3. Now go to advanced and Wipe Dalvik Cache
4. Go back to main menu of recovery mode
5. Now select install zip from sd card
6. Choose the file “octarom_kk_1.zip”
7. Wait for 5-10 minutes for the ROM to flash completely.
8. Once its done go back to main menu and reboot your phone
9. Tada! Your device is running KitKat now 

DOwnload rom from here