A:
To use the Galaxy Tab Pro 8.4" WiFi outside your home, you'll need to find some WiFi hotspots. Coffee shops, restaurants, and other locations will have wifi hotspots. If you have a smartphone with 4G LTE you could contact your carrier and add the WIFi hotspot option. Turn your phone into a hotspot for your tablet. I use Comcast for Internet at home, which includes the xfinitiy WiFi hotspots all over the place. I mostly use those when I'm not at home.
If you lose internet because your WiFi signal is too weak, you may need to move your WiFi router to a better location in the house to offer better coverage. Keep it away from large metal objects.