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ATT is light on cell sites. I recently moved to NW Florida and can tell you that coverage is poor to non-existent in Gulf, Franklin, Holmes, Washington, and even Jackson Counties. Last week they switched on LTE to keep up with the RED company however LTE doesn't work when there is "no coverage". There are even dead zones along US 231 which is disgraceful. One of the sites in zip 32448 (Marianna) doesn't even encode the time.