Hi my friend,
I found I can not replace the HTC default telephone application. As I replaced the default phone application(system/app/Phone.apk) to a third party "Hidialer.apk", then 'make snod', and run it in emulator, I found phone button not work, and in logcat have error :"Unable to find ITelephony interface". It make me confused, why phone not work but default HTC phone can ? What is the reason ?