Greetings Dr. Lokesh! Welcome to the Windows Mobile Owners Forum.
The HTC P3300 is usually relabed by cell companies. If so, then they most likely "tweaked" the ROM image to provide you with some specialized features that are specific to their network. If you bought your device through a cell provider, then you will want to consult their webpage for any possible updates to the ROM image for their model (the HTC P3300).
Best of luck my friend! Let me know if you have anymore questions, I will be happy to assist!