With all carriers, coverage maps are only approximate.

Here's Sprint's disclaimer:

Our coverage maps provide high level estimates of our coverage areas when using your device outdoors under optimal conditions. Coverage isn't available everywhere. Estimating wireless coverage and signal strength is not an exact science.
There are gaps in coverage within our estimated coverage areas that, along with other factors both within and beyond our control (network problems, software, signal strength, your wireless device, structures, buildings, weather, geography, topography, etc.), will result in dropped and blocked connections, slower data speeds, or otherwise impact the quality of services.
Services that rely on location information, such as E911 and GPS navigation, depend on your device's ability to acquire satellite signals (typically not available indoors) and network coverage. E911 services also depend local emergency service provider systems/support. Estimated future coverage subject to change.

Some other carriers, like Verizon don't tell you how good the coverage is...they just say it is available. Meaning you could have 4 bars or 0.

I have never seen these "good" or "poor" indicators be true. I know T-Mobile says they have "excellent" service here in my town...but that's only one bar.

I can tell you that if you're with Sprint and you travel along an interstate or highway, they will provide amazing digital voice coverage. Once you travel off that...who knows what will happen.

As long as the map says coverage is available, it should work fine.

Originally Posted by hangn_9

The coverage map for the areas I travel most are "good" I work on the RR and travel between Ft mad Iowa and Chi. Chi is "best" on the coverage map. The "good" scares me a little as I travel to Chi every other day.

The coverage map for the areas I travel most are "good" I work on the RR and travel between Ft mad Iowa and Chi. Chi is "best" on the coverage map. The "good" scares me a little as I travel to Chi every other day.