For user facing problems in catching 2G Signals on their phones, this is the fix.
The most easiest way is to download the new ZIP modem.img and flash it directly through recovery !!! If after flashing this patch, you still can't get 2G signals, then delete all files in device/data/nvram using a root file manager and then reboot.
If you have the modem.img file from CM11, then open your ROM in winrar. Navigate to system/etc/firmware/ and find a file named modem_1_3g_n.img. Replace this file with the downloaded modem.img file and rename it as modem_1_3g_n.img. Now flash this rom again !
Just manually replace modem.img in system/etc/firmware/ in your Root File Manager, then set right permissions. Then delete all files in device/data/nvram and then reboot.
2. Blue Dialer
The Kitkat ROM comes with a boring white and grey colored dialer. Replace it with the one in Kitkat Phones by downloading this apk and replacing it with the stock one under system/priv-app with a Root File Manager, then set right permissions and reboot.
3. New Kernel - 18.11.2014
If you haven't flashed the new kernel already, then do it now. It improves performance (as seen in Antutu scores).
4. Camera Patch
People who have A116i model of Canvas HD still don't have a fix (because A116i has a different Camera module). Other A116 users can flash these patches to fix the blue cam problem, change resolution from 8 mp to 13 mp, and to change the erratic timing of flashlight. These are 2 patches in total. First flash the 10 mb patch and then the 13mpbluecamfix patch.
5. SD-Card Read/Write Error Fix
"Google imposed new restrictions in Android 4.4 update. Data can only be read and not written so some of the file explorers may not work. You will not be able to delete any data present on your internal memory through the phones file manager."
To fix this problem, flash this patch.
The Discovery ROM comes with Superuser instead of SuperSU. One problem with Superuser is that while asking to grant to root permissions for an app, it occupies the whole screen. Also, SuperSU offers more functionality than Superuser. First remove Superuser by using Titanium Backup and then flash this patch to get SuperSU.
7. Space Partition
This thing requires more hardwork than any other patch i've already mentioned. You can increase your Phone Storage to install more apps. Refer to this thread to know more-
DOWNLOAD Links are in the 2nd post.
Please hit the Thanks button if i helped you in any way.. !!