The below maps highlight both voice and text coverage.

The MobileNation all-digital wireless network gives our members reliable voice coverage and access to innovative services like web browsing and picture messaging. Maps represent the 
rate area and an approximation of available coverage. Member must live within an approved zip code area to acquire service. The MobileNation Coverage Areas depict an approximation of outdoor coverage that is affected by such things as terrain, weather, foliage, buildings and other factors, and for this reason, cannot be guaranteed. With this, actual coverage area may differ from map graphics.