I want to develop VoIP Client application (Full-duplex). Also this application should work on all handsets (S60 3rd Edition - FP1 & FP2, S60 5th Edition)
Now the question is, which symbian SDK is required for this?
If i develop application on S60 5th Edition then will it work on S60 3rd Edition (FP1 & FP2 both) without any changes?
If there are changes required then provide me details of changes.
Please help me....