Steps:
1. First of all you need to install the latest version of BBSAK.2. Secondary you need to download Indic cod file.
3. Now connect your BlackBerry Curve 3G via PC.
4. You need to make sure that your BlackBerry Desktop Manager is not open throughout this process.
5. Now open BBSAK application and enter your phone's password if any.
6. Now once the application is started, it should show your BB PIN, if not then it is not connected.
7. Next step is you need to go on Modify CODs tab and click on Read System.
8. Now click on Install COD(s) and locate the Indic cod file and click OPEN.
Download links:
BBSAK
Indic cod
(Supported on BlackBerry 3G OS6 only)