Hello so I got a new 7 inch android tablet. Here wat I already have: I connected to my wifi I created a gmail account I have a google number I add text and phone dialer app but when I try to make a phone call it say network not in service? It appears I need GoggleVoice to use the phone but I am so confussed??? I don't know how to get the phone working on my tablet but everything else is working ok. Some step by step info would sure help -Thanks to anyone who can help!