BD bro,

In short, you can choose where you want your voicemail to be stored.

In your case,  probably "do not disturb" mode is enabled (is it default?, not sure). To fix it, go to settings > voicemail and SMS and play with several features there. Trial and error should solve your problem.

Or, spend some time watching google voice videos at http://www.youtube.com/user/GoogleVoice

There are several features you will just say "wow"

Lastly, sending SMS (text) to Nepal is FREE (probably Beta, but it works)