gTalk® Home Phone service offers a smart-phone app named gTalk® Home App at no additional cost to its customers. The app extends reach of your gTalk® Home Phone to anywhere through the Internet. So irrespective of geographic location gTalk® Home app makes you feel as if you are at your home.
gTalk® Home app also allows you to avoid expensive roaming charges you currently incur while traveling abroad. The app offers one touch calling features as well.
Disclaimer: Continued use of GPS running in the background can dramatically decrease battery life.