Cell phone signals are radio waves, the AM-FM kind. And like all wind and waves, they easily go in different directions without notice. Almost anything under the sun can change, absorb, and block your Straight Talk service. Here are top 5 examples:
Cell tower distance: Physical distance and power transmission distance
Outside interference: Trees, hills, mountains, valleys, and tall structures.
Building material: Metal (especially metal!), glass, concrete, brick, radiant barrier, and other conductive material (electrical or magnetic).
Internal building obstructions: Thick walls, plaster, drywall, and other electrical devices & clutter, etc.
Even weather (yup): Rain, thunderstorms, solar flares, etc.
Any combination of these problems can drastically reduce your service.
Doesn't matter if you're rural or urban area, poor cell phone signal affects us all. But there is a way to improve your signal for good.