Cell phone coverage map for Graball, TN
Zoom in for local detail. Tap or click a colored area to see coverage and signal details. On mobile, use two fingers to move the map.
Map data © OpenStreetMap contributors, © OpenMapTiles. Basemap by OpenFreeMap. Rendered with MapLibre. FCC BDC mobile coverage processed by CompareWirelessCarriers.
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Cell phone coverage rankings by network in Graball, TN
T-Mobile
- Overall
- 84.0%
- 4G LTE
- 84.0% avg. -105 dBm 4G LTE signal where 4G LTE coverage exists: avg. -105 dBm
- 5G
- 42.0% avg. -99 dBm 5G signal where 5G coverage exists: avg. -99 dBm
- Fast 5G
- 6.0% avg. -90 dBm Fast 5G signal where Fast 5G coverage exists: avg. -90 dBm
Verizon
- Overall
- 98.0%
- 4G LTE
- 98.0% avg. -103 dBm 4G LTE signal where 4G LTE coverage exists: avg. -103 dBm
- 5G
- 26.0% avg. -114 dBm 5G signal where 5G coverage exists: avg. -114 dBm
- Fast 5G
- 4.0% avg. -105 dBm Fast 5G signal where Fast 5G coverage exists: avg. -105 dBm
AT&T
- Overall
- 64.0%
- 4G LTE
- 60.0% avg. -119 dBm 4G LTE signal where 4G LTE coverage exists: avg. -119 dBm
- 5G
- 44.0% avg. -117 dBm 5G signal where 5G coverage exists: avg. -117 dBm
- Fast 5G
- 4.0% avg. -115 dBm Fast 5G signal where Fast 5G coverage exists: avg. -115 dBm
County coverage is shown for surrounding-area context and uses land-area only coverage.
Coverage varies by neighborhood. Your carrier shouldn’t.
US Mobile lets you switch between all three major networks, so you can choose the one that works best where you actually use your phone.
Pricing, network access, switching terms, and home internet availability may vary.
Coverage by ZIP code in Graball, TN
ZIP code areas can extend beyond city limits, so this table is best used for local comparison around the city.
| ZIP Code | AT&T | T-Mobile | Verizon |
|---|---|---|---|
| 37066 | 95.1% 95.0% 86.8% 60.5% | 96.9% 96.9% 92.6% 75.8% | 99.3% 99.3% 87.6% 72.4% |
| 37148 | 89.3% 89.1% 73.2% 47.1% | 90.9% 90.9% 78.9% 58.4% | 98.8% 98.8% 70.5% 48.4% |
About The Coverage Data
Coverage and signal estimates are derived by Compare Wireless Carriers from carrier-reported data in the FCC’s National Broadband Coverage Map, last updated in June 2026. “Percent covered” shows how much of the city or ZIP code area has a carrier signal, whether weak or strong. Signal bars show the estimated average signal strength in areas of Graball, TN where that carrier has coverage.
If a carrier says you should have service but you do not, run a challenge test with the FCC Mobile Speed Test App. The FCC uses those results to check carrier-submitted coverage data and requires a carrier response when enough tests show a pattern of inaccurate coverage reporting.